Patna: Two persons were arrested for allegedly assaulting an assistant sub-inspector (ASI) during a raid on an illegal gambling den in Bypass police station area of Patna, police said on Saturday. The ASI, who was allegedly dragged to a nearby field and assaulted by a group of men, sustained head injuries in the attack, while his uniform was smeared with mud.The incident occurred on Mahuli Road on the night of Nov 11, but came to light after a video allegedly showing the assault surfaced on social media and went viral on Friday.According to police, a team led by ASI Saryu Prasad had reached the area following information about illegal gambling activities. As the police launched the raid, some local youths allegedly opposed the action and surrounded the team. Police said the situation escalated when the attackers allegedly dragged the ASI to a nearby field and assaulted him. He suffered head injuries during the attack before the accused fled the spot.Bypass police station SHO Ranjit Kumar on Saturday confirmed the incident and said a named FIR had been registered against 15 people in connection with the assault. “Two of the accused have been arrested and sent to jail, while raids are underway to apprehend the remaining suspects. Further investigation is in progress,” the SHO said.