Palermo police said they had detained 15 people suspected in the high seas assault, which they learned of while interviewing tearful survivors from Nigeria and Ghana who had arrived in Palermo Wednesday morning after being rescued at sea by the ship Ellensborg.

The 15 were accused of multiple homicide aggravated by religious hatred, police said in a statement.

The survivors said they had boarded a rubber boat April 14 on the Libyan coast with 105 passengers aboard, part of the wave of migrants taking advantage of calm seas and warm weather to make the risky crossing from Libya, where most smuggling operations originate.MORE