Braintree Police say they have arrested three men for allegedly selling or possessing heroin, the latest in a series of busts as law enforcement officials try to clamp down on a statewide surge in opiate abuse. The June 3 arrests occurred after Braintree detectives doing routine surveillance in the South Shore Plaza parking lot spotted the occupants of two vehicles, a black Mercedes and a brown Honda Civic, acting suspiciously. When the cars left the parking lot together, the detectives followed, tracking them to the parking lot of a restaurant near South Braintree Square. Three men got out of the cars, entered the restaurant’s bathroom, then left a moment later. When officers stopped them for questioning, they discovered drugs in both vehicles and $411 in cash on one man. George T. Daher, 35, of Stoughton, was arrested and charged with heroin possession and conspiracy to violate drug laws. Divanny M. Cabral, 21, of Hyde Park, and Juan F. Pena, 21, of Boston, were arrested and charged with distribution of heroin and conspiracy to violate the drug laws.