Italian coast guard authorities seized a migrant rescue boat operated by a German aid group in the Mediterranean suspected of aiding illegal immigration from Libya, a prosecutor said on Wednesday.

Video showed the Iuventa, which is run by Jugend Rettet, arriving at the island of Lampedusa surrounded by several coast guard vessels after it was stopped at sea before dawn.

Police inspected the ship as soon as it docked and checked the crew passports. They later took charge of the boat and set sail for a larger port in Sicily.