Two PSNI officers were injured while investigating reports of Covid regulation breaches and underage drinking at a licensed premises in County Tyrone on Friday evening.
Police were responding to a call made around 6.35 pm yesterday.
Upon entering, the officers found around 150 people on the premises in Fintona, Co Tyrone and breaches of the Northern Ireland Health Protection Regulations were observed.
As police were dealing with the incident, a male officer was punched and knocked unconscious. He was subsequently taken to hospital.
Another officer, who attempted to detain the suspect, was also punched.
A 17-year-old male was subsequently arrested on suspicion of offences, and he remains in custody assisting police.