State Police have cited a Boston firefighter who was driving a firetruck that collided with an off-duty police officer’s vehicle in Mattapan while reponding to a call Tuesday. State Police said that a fine not to exceed $150 was issued to Francis X. Tierney, 52, of Hyde Park. Tierney’s truck, which had its emergency lights and siren activated, collided with a sport utility vehicle driven by Officer Darrell Vinson, 46, of Mattapan at the intersection of Harvard and Morton streets. State Police said Tierney is being fined for a red light violation. Both men were taken to hospitals with injuries after the accident, authorities said. Emergency vehicles responding to a call are required to stop at red lights.