8:30 p.m.
Se Gwang Ri of North Korea picked up his country's second gold medal in Rio, edging Denis Abliazin for gold in the men's vault final Monday.
Ri's two-vault average of 15.691 was better than Abliazin's average of 15.516. The medal for Abliazin was his second in less than an hour. He earned bronze on still rings earlier Monday afternoon.
Japan's Kenzo Shirai earned bronze in a tiebreaker over Romania's Marian Dragulescu. The two vaulters both averaged 15.449 for their two vaults, but Shirai was awarded the bronze because he had the highest score on a single vault.
7:45 p.m.
Eleftherios Petrounias of Greece has won the Olympic gold medal in men's still rings.
The reigning world champion put together a precise routine, finishing with a stuck dismount to post a score of 16.000. Arthur Zanetti of Brazil captured silver, delighting the home crowd inside Rio Olympic Arena. The crowd repeatedly shushed itself during Zanetti's set then exploded when his score of 15.766 flashed.
Denis Abliazin of Russia earned bronze
7:30 p.m.
Russian whistleblower Yulia Stepanova says she fears for her safety since hackers infiltrated both her email account and the anti-doping system that keeps track of her whereabouts.
Stepanova, the 800-meter runner who was denied a spot in the Olympics by the International Olympic Committee, says she, her husband and their young son recently moved to another undisclosed location in the United States.
Stepanova unveiled details that led to the discovery of a wide-ranging doping system inside her home country. The Russian track team has been banned from the Olympics, but the IOC has allowed 278 athletes in other sports to compete.
Stepanova said she would of course like to be in Rio De Janeiro, but she has heard stories about crime and lack of security in the Olympic city and thinks it would be easy for someone to hurt her if she were in Brazil right now.
The World Anti-Doping Agency said last week that hackers had accessed their system. Included in that was information about Stepanova's whereabouts. All athletes are required to provide that information so they can be reached in case they're chosen for an out-of-competition drug test.
7:05 p.m.
Charlotte Dujardin and Valegro have clinched a second successive gold dressage medal, setting an Olympic record in the process.
To the sound of samba music, the British rider posted a score of 93.857 percent and beat the record she set in London four years ago, also on Valegro.
Dujardin was the only rider to surpass the 90 mark on Monday. She finished ahead of Isabell Werth and Kristina Broring-Sprehe, who were both part of the Germany team that won Friday.
It was a fourth silver medal for Werth and a 10th overall.
Werth had a score of 89.071 on Weihegold OLD, with Broring-Sprehe posting 87.142 on Desperados.
6:30 p.m.
Russia is atop the standings after the duet technical routine in synchronized swimming.
Natalia Ishchenko and Svetlana Romashina scored 96.4577 points for their routine Monday. They also led after the free routine a day earlier, giving them a combined score of 194.5244.
Huang Xuechen and Sun Wenyan of China were second at 191.4355. Yukiko Inui and Risako Mitsui of Japan were third at 187.5214.
Americans Anita Alvarez and Mariya Koroleva was ninth. The duet free final is Tuesday.
6:20 p.m.
New Zealand's Lisa Carrington, the world's top female kayaker, made paddling look easy as she made the final of the 200-meter sprint.
The four-time world champion and defending Olympic titleholder cruised through two heats in first place to win a spot in the Tuesday final. She looked relaxed, which pleased her coach Gordon Walker.
Carrington, 27, is also competing in the 500-meter sprint.
In the men's 1,000-meter canoe singles, defending Olympic champion Sebastian Brendel is through to the final along with home crowd favorite Isaquias Queiroz of Brazil and Serghei Tarnovschi of Moldova. All three won their heats Monday.
Danuta Kozak and Gabriella Szabo paddled into the final of the women's 500-meter kayak doubles while Australia's Murray Stewart is set to race for medals in the men's 1,000-meter kayak singles after clocking the fastest time in the semifinals.
5:50 p.m.
Nicholas Bett, who won a surprising world title in the 400-meter hurdles last year, has been disqualified in the first round at the Olympics.
The 26-year-old Kenyan was contending for the lead in heat 5 when he crashed into the 10th and last hurdle. He stumbled and crossed the finish in last spot, and was later disqualified. Michael Tinsley, the Olympic silver medalist in 2012, also failed to qualify after placing fifth in the last heat.
Two other Americans reached the semifinals, with Byron Robinson clocking 48.98 seconds and two-time world champion Kerron Clement running 49.17.
Annsert Whyte of Jamaica led qualifying in a personal best 48.37 and London Olympic bronze medalist Javier Culson of Puerto Rico ran 48.53.
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5pm
Anita Wlodarczyk of Poland has won the Olympic women's hammer throw gold medal with a world record of 82.29 meters.
Zhang Wenxiu of China took silver with her season-best 76.75 and Sophie Hitchon of Britain moved into the bronze medal position with her last attempt of 74.54.
4:50 p.m.
Ruth Jebet opened a huge gap halfway through and didn't look back to win gold in the women's 3,000-meter steeplechase in the second fastest time ever.
A world record was on the cards at the Olympic Stadium on Monday until the final few meters when Jebet slowed. She crossed in 8 minutes 59.75 seconds, less than a second off the world mark of Russia's Gulnara Galkina.
The Kenya-born Jebet, who represents Bahrain, now holds two of the three fastest times ever over the barriers.
Kenya's Hyvin Kiyeng Jepkemoi, the world champion, claimed the silver medal but was over seven seconds behind Jebet.
American Emma Coburn, who led in the early stages, took bronze to be the first woman from the U.S. to win an Olympic medal in the steeplechase.
4:45 p.m.
The spokesman for the Rio Games organizing committee has apologized to U.S. swimmer Ryan Lochte and three of his teammates over how they were robbed earlier this week, and revealed that security officials have been asked to be even more vigilant going forward.
Through the U.S. Olympic Committee, Lochte said he and fellow U.S. swimmers Gunnar Bentz, Jack Conger, Jimmy Feigen were robbed when the taxi they were in early Sunday was stopped by people posing as police officers. Lochte told NBC that one of the robbers held a gun to his forehead.
"We obviously regret that the violence has (gotten) so close to athletes," Rio Games spokesman Mario Andrada said Monday. "We have requested security authorities that they need to make sure everybody's safe everywhere in the city. We apologize to those involved. Once again, we regret that violence is still an issue at these games."
Street crime was a major concern of Olympic organizers going into the games, and there have been several high-profile problems on that front since the games started.
4:20 p.m.
Sharon van Rouwendaal of the Netherlands has cruised to a dominating victory in women's 10-kilometer open water swimming at Fort Copacabana.
She earned gold in 1 hour, 56 minutes and 32.1 seconds - winning by 16.6 seconds.
Rachele Bruni of Italy earned silver in 1:56.49.5. Poliana Okimoto of Brazil took bronze in 1:56.51.4, earning the host country's first swimming medal of the games and the first ever medal in the sport by a Brazilian woman. All the country's previous swim medals were won by men.
Aurelie Muller of France crossed the finish line in second but was disqualified.
American Haley Anderson, silver medalist four years ago in London, finished fifth.
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11:15 a.m.
Mark Cavendish has some ground to make up in the omnium if he wants to add to Britain's impressive gold-medal haul inside the Olympic velodrome Monday night.
The winner of 30 stages in the Tour de France is tied for second with France's Thomas Boudat behind Italian rider Elia Viviani with two disciplines left in the six-discipline omnium.
Viviani put in a strong ride in the time trial during the morning session to take the lead.
There will be a new Olympic champ in the women's sprint after Australia's Anna Meares was defeated in the repechages Monday morning. Britain's Becky James and Katy Marchant are still alive.
3:35 p.m.
Two-time Olympic champion Veronica Campbell-Brown has missed out on qualifying for the semifinals in the women's 200 meters.
The 34-year-old Campbell-Brown, who won the 2004 and '08 Olympic titles and was a bronze medalist at the last world championships, was third in the last of nine first-round heats and her time of 22.97 seconds was not fast enough to progress.
Marie-Josee Ta Lou of Ivory Coast posted the fastest time in qualifying, a personal best 22.31, followed by Americans Deajah Stevens in 22.45 and Tori Bowie, the silver medalist in the 100, in 22.47.
World champion Dafne Schippers won the first heat and advanced in 22.51. Elaine Thompson, who won the 100 Olympic title, was second in her heat in 22.63.
The semifinals are Tuesday, and the final is on Wednesday night.
11:10 a.m.
The lone Russian track and field athlete at the Olympics has won her appeal to compete at the Rio de Janeiro Games.
The Court of Arbitration for Sport ruled early Monday morning that long jumper Darya Klishina is eligible to take part in Tuesday's qualifying.
Klishina was the only one of 68 Russians cleared to participate in Rio by the IAAF, largely because she has been based outside Russia for the past three years. But the sport's governing body banned her from the Olympics last week after receiving what it said was new information.
CAS ruled that Klishina was eligible to compete because she fulfilled the requirements set by the IAAF.
The long jump final is scheduled for Wednesday.