Police arrested two teenagers for allegedly robbing three boys on a Waikiki-bound city bus last night.

Police said three boys, ages 13 and 14, were sitting in the back of the bus when two older teens got on and sat next to them at about 10:15 p.m.

An 18-year-old man grabbed an iTouch from one of the boys who was using it to listen to music, and a 17-year-old boy threatened the other two boys and had them empty their pockets, police said. The two older teens got off at near Red Lobster along Ala Moana Boulevard, and the victims got off at the next stop near Hilton Hawaiian Village and called police.

Responding officers found the two older teens, and the victims identified them in a field line-up. The 18-year-old, of Waipahu, was arrested on suspicion of theft and two warrants. The 17-year-old was also arrested.