A police officer was shot and killed during a traffic stop in a central Massachusetts town early Sunday, and a suspect is on the loose, authorities said. The vehicle's occupant shot Tarentino and then fled the scene, Sluckis said. Auburn police Officer Ronald Tarentino was shot at about 12:30 a.m. after stopping a vehicle on a residential street, Chief Andrew Sluckis said during a news conference Sunday afternoon. The 42-year-old Tarentino was taken to UMass Medical Center, in Worcester, where he was pronounced dead. "We will leave no stone unturned in our investigation to determine who was involved," Sluckis said.

Source: ABC News May 22, 2016 05:10 UTC