Police were searching late Friday for John “Jack” Brosnahan, 67, a former Bedford police officer, as a suspect in the death of three family members fatally shot “as a result of a domestic altercation,” police said.

Police responded to a report of gunshots at about 6:40 p.m. to a home on Grove Street, where they found the bodies.

Brosnahan fled in a white 2011 Toyota Camry, license plate 467MNO, police said. Anyone with information had been asked to contact the Massachusetts State Police at (508) 820-2121 or to call 911 immediately, and authorities warned people to not approach the suspect, since he was believed to be armed.

As of shortly after 10 p.m., though, WBZ-TV was reporting that Brosnahan was dead, his body and car found in Brighton near the Charles River shortly after 9:30 p.m. “He died of an apparent self-inflicted gunshot wound,” the station said.