A Pleasantville man was arrested Tuesday after he allegedly robbed a city liquor store at gunpoint on two occasions last month, police said. Robert Arroyo, 39, was charged with four counts of aggravated assault, two counts of robbery, two counts of unlawful possession of a weapon and two counts of possession of a weapon for an unlawful purpose. He was sent to the Atlantic County jail. The robberies occurred April 4 and 26 at a store in the 3300 block of Atlantic Avenue