Greece's coast guard says a wooden boat carrying a large number of refugees or other migrants has run aground on the small eastern Aegean island of Leros, while an infant died after the inflatable dinghy he was in partially sank off the coast of Lesbos island.

The wooden boat, carrying about 100 people, ran aground Friday on the northeast coast of Leros, the coast guard said. Those on board were being taken to shore by coast guard and private vessels that arrived to help.

In the Lesbos incident, the coast guard rescued 56 people from the sea Thursday night after the rear part of their dinghy burst, partially sinking the boat. A 1-year-old boy was recovered unconscious and transported to a hospital, but rescuers were unable to revive him.

Greece's coast guard says it has rescued 542 people in 12 search and rescue incidents from Thursday morning to Friday morning.

The rescues occurred off the coasts of the eastern Aegean islands of Lesbos, Chios, Samos, Agathonissi and Farmakonissi, the coast guard said.

Hundreds of thousands of people fleeing war and poverty in their homelands have reached Greece so far this year, the vast majority on rickety boats or cheap inflatable dinghies from the nearby Turkish coast. Although a short sea journey, it can be fatal as the unseaworthy and overloaded boats sometimes sink.

Very few of those arriving in Greece want to stay in the financially stricken country, instead moving north through the Balkans to more prosperous European Union countries such as Germany, Austria and Sweden.