A white man who joined a prayer meeting inside a historic black church and then fatally shot nine people was captured without resistance Thursday after an all-night manhunt, Charleston's police chief said.

Dylann Storm Roof, 21, spent nearly an hour inside the church Wednesday night before killing six women and three men, including the pastor. A citizen spotted his car in North Carolina and tipped police, Chief Greg Mullen said.

The chief wouldn't discuss a motive. Charleston Mayor Joseph P. Riley Jr. called it "pure, pure concentrated evil." Stunned community leaders and politicians condemned the attack on The Emanuel African Methodist Episcopal Church, and Attorney General Loretta Lynch said the Justice Department has begun a hate crime investigation.

President Barack Obama, who personally knew the slain pastor, state Sen. Clementa Pinckney, said these shootings have to stop.

"At some point, we as a country will have to reckon with the fact that this type of mass violence does not happen in other advanced countries," Obama said.

Pinckney, 41, was a married father of two who became the youngest member of the South Carolina state House when he was elected as a Democrat at 23.

"He never had anything bad to say about anybody, even when I thought he should," State House Minority leader Todd Rutherford told The Associated Press. "He was always out doing work either for his parishioners or his constituents. He touched everybody."

Roof's childhood friend, Joey Meek, alerted the FBI after recognizing him in a surveillance camera image, said Meek's mother, Kimberly Konzny. Roof had worn the same sweatshirt while playing Xbox videogames in their home recently.

"I don't know what was going through his head," Konzny said. "He was a really sweet kid. He was quiet. He only had a few friends."

Roof had been to jail: State court records show a pending felony drug case against him, and a past misdemeanor trespassing charge.

He also displayed the flags of defeated white-ruled regimes: a Confederate flag was on his license plate, Konzny said, and a photo on his Facebook page shows him wearing a jacket with stitched-on flag patches from Rhodesia and apartheid-era South Africa.

The shooting evoked painful memories of other attacks. Black churches were bombed in the 1960s when they served as organizing hubs for the Civil Rights movement, and burned by arsons across the South in the 1990s. Others survived shooting sprees.

This particular congregation, which formed in 1816, has its own grim history: A founder, Denmark Vesey, was hanged after trying to organize a slave revolt in 1822, and white landowners burned the church in revenge, leaving parishioners to worship underground until after the Civil War.

This shooting "should be a warning to us all that we do have a problem in our society," said state Rep. Wendell Gilliard, a Democrat whose district includes the church. "There's a race problem in our country. There's a gun problem in our country. We need to act on them quickly."

"Of all cities, in Charleston, to have a horrible hateful person go into the church and kill people there to pray and worship with each other is something that is beyond any comprehension and is not explained," Riley said. "We are going to put our arms around that church and that church family."

NAACP President and CEO Cornell William Brooks said "there is no greater coward than a criminal who enters a house of God and slaughters innocent people."

A few bouquets of flowers tied to a police barricade outside the church formed a small but growing memorial.

The attack came two months after the fatal shooting of an unarmed black man, Walter Scott, by a white police officer in neighboring North Charleston that sparked major protests and highlighted racial tensions in the area. The officer awaits trial for murder, and the shooting prompted South Carolina lawmakers to push through a bill helping all police agencies in the state get body cameras. Pinckney was a sponsor of that bill.

"I am very tired of people telling me that I don't have the right to be angry," Community organizer Christopher Cason said. "I am very angry right now."

The FBI will aid the investigation, Mullen told a news conference that was attended by FBI Special Agent in Charge David A. Thomas.

Charleston Mayor Joseph P. Riley called the shooting "the most unspeakable and heartbreaking tragedy."

"The only reason that someone could walk into a church and shoot people praying is out of hate," Riley said. "It is the most dastardly act that one could possibly imagine, and we will bring that person to justice. ... This is one hateful person."

State House Minority leader Todd Rutherford told The Associated Press that the church's pastor, state Sen. Clementa Pinckney, was among those killed.

Pinckney 41, was a married father of two who was elected to the state house at age 23, making him the youngest member of the House at the time.

"He never had anything bad to say about anybody, even when I thought he should," Rutherford said. "He was always out doing work either for his parishioners or his constituents. He touched everybody."

The attack came two months after the fatal shooting of an unarmed black man, Walter Scott, by a white police officer in neighboring North Charleston that sparked major protests and highlighted racial tensions in the area. The officer has been charged with murder, and the shooting prompted South Carolina lawmakers to push through a bill helping all police agencies in the state get body cameras. Pinckney was a sponsor of that bill.

In a statement, Gov. Nikki Haley asked South Carolinians to pray for the victims and their families and decried violence at religious institutions.

"We'll never understand what motivates anyone to enter one of our places of worship and take the life of another," Haley said.

Soon after Wednesday night's shooting, a group of pastors huddled together praying in a circle across the street.

Community organizer Christopher Cason said he felt certain the shootings were racially motivated.

"I am very tired of people telling me that I don't have the right to be angry," Cason said. "I am very angry right now."

Even before Scott's shooting in April, Cason said he had been part of a group meeting with police and local leaders to try to shore up relations.

The Emmanuel AME church is a historic African-American church that traces its roots to 1816, when several churches split from Charleston's Methodist Episcopal church.

One of its founders, Denmark Vesey, tried to organize a slave revolt in 1822. He was caught, and white landowners had his church burned in revenge. Parishioners worshipped underground until after the Civil War.