ROME (AP) — Italy's coast guard says a migrant boat has overturned off Libya's coast with an unknown number of passengers on board. It says so far 88 people have been rescued.

Coast Guard. Cmdr. Cosimo Nicastro told The Associated Press the capsized boat was first spotted Thursday by an aircraft participating in the European Union monitoring operation. The Italian coast guard responded with two rescue vessels to the location some 30 miles (50 kilometers) off Libya's coast.

Nicastro said 88 people had been rescued from the capsized wooden boat. He said he didn't have any information about whether any bodies were recovered or how big the boat was.

It is one of about 20 search-and-rescue operations underway Thursday. Nicastro said of the eight operations concluded, some 1,000 migrants have been rescued.