LYNN – One man was injured during a violent assault at the Side Street Pub on Spring Street Friday.Around 4 p.m., police said three unidentified white males, believed to be members of the Hells Angels, quietly walked into the pub and attacked the victim with brutal force.They reportedly punched the victim, who is in his 40s, and hit him several times with a pool stick, causing lacerations to his face.Police say the victim was conscious and alert when he was transported by ambulance to Union Hospital.The three suspects immediately fled the scene in a dark pickup truck before police arrived.A description of the suspects was very vague, according to Lynn police Sergeant John Carrow, who said witnesses appeared nervous and were reluctant to describe what they saw happen at the pub.Anyone with information is asked to contact the Lynn Police Department at 781-595-2000.