An 82-year-old man was surrounded and assaulted by a group of people riding dirt bikes and ATVs in Boston last Thursday. Police are seeking the public’s help in identifying the suspects. The victim, a Brookline man, suffered serious injuries and remains in the hospital. He is expected to survive. State Police said the man was driving his 1996 Buick Century from Park Drive to Boylston Street when 30 to 40 dirt bike and ATV riders forced him onto the curb. Several of the suspects then began smashing windows of the victim’s car.