MS Achille Lauro was a cruise ship based in Naples, Italy. Built between 1939 and 1947 as MS Willem Ruys, a passenger liner for the Rotterdamsche Lloyd, she was hijacked by members of the Palestine Liberation Front in 1985. In other incidents, she also suffered two serious collisions (in 1953 with the MS Oranje and in 1975 with the cargo ship Youseff) and four onboard fires or explosions (in 1965, 1972, 1981, and 1994). In the last of these, in 1994, the ship caught fire and sank in the Indian Ocean off Somalia.