(AP Photo/Laszlo Balogh) The Viking Sigyn hotel ship is moored following a collision with a sightseeing boat in Budapest, Hungary, Thursday, May 30, 2019. A massive search was underway on the Danube River in downtown Budapest for over a dozen people missing after a sightseeing boat with 33 South Korean tourists sank after colliding with another vessel during an evening downpour. Seven people are confirmed dead, officials said Thursday.