At least 11 dead, 31 rescued after boat capsizes near Puerto Rico

A boat loaded with passengers capsized north of an uninhabited island near Puerto Rico. Eleven people had been confirmed dead while 31 others were rescued Thursday, authorities said.

It wasn't immediately clear how many people were aboard the boat when it turned over, said U.S. Coast Guard spokesman Ricardo Castrodad. He said a "mass rescue effort" was still underway.

"We're looking to rescue as many people as we can and find as many survivors as we can," he said.