Two masked men robbed a South Boston deli at gunpoint on Friday night, then fled with a third man, leading police on a short chase and crashing their sedan into a bus and three other cars outside the Andrew Square MBTA Station, Boston police said. One man was arrest­ed, but the other two ­escaped on a Red Line train.

Police recovered cash, cigarettes, and a gun inside the car the men drove, said Captain John Danilecki of the Boston ­police, but by late Friday night authorities had not located the missing two men or the second gun used in the robbery.