Police received a tip that led to the Thursday arrest of one of four men who allegedly robbed a 19-year-old man apparently at gunpoint Sunday. 

At 12:30 a.m. Sunday, the men drove up to a group of young people parked at a lookout point on Tantalus. 

Two men got out of the vehicle demanding money, and one of them said he had a gun wrapped in a towel and allegedly threatened to shoot the teen  if he didn’t comply. 

The same suspect then allegedly demanded the keys to a moped belonging to the teen, and fled on the moped. 

The other suspects left in the vehicle. 

Police received a tip Thursday saying a suspect was at the Kapahulu Groin. 

Police located the 22-year-old suspect and arrested him on suspicion of first-degree robbery at 9:41 p.m. Thursday.