Dutch authorities were trying on Tuesday to determine the motive behind the shooting incident on a tram in the Dutch city of Utrecht in which three people were killed and five wounded. A Turkish-born man, 37-year-old Gokmen Tanis, was arrested after a seven-hour manhunt on Monday by security forces. Prosecutors have said he is suspected of three fatal shootings, possibly with terrorist intent. It was still unclear whether Tanis, who has a history of run-ins with law enforcement, was acting on political beliefs or a personal vendetta. Under Dutch law he must be brought before a judge by Thursday but does not have to be charged.