WYE Valley parents are upset after a rave turned violent with apparently little supervision by police.

Both Gloucestershire and Gwent Police however say the incident was small and nothing got out of hand.

An informant told the Review of horrific screams and shocking abuse to a young man thought to be from Newport.

"There was one guy who was jumped on by approximately ten other kids or men. He was screaming for help, but no one could help him because there were just too many of the gang.

"The gang kicked and stamped on his head whilst he was on the floor shouting for them to stop and for help.

"They held his arm out and stamped on it, urinated on him whilst shouting 'I want to hear you scream'.

"The people that went to the scream called the police straight away. It took the police around 20 or 30 minutes to get to Tintern and then they wouldn't do anything because there were only two of them.

"They waited for another car to come and still they wouldn't do anything because there were only four or five of them. Eventually the riot van arrived."

The informant believes the attackers were not arrested and was also unsure about whether the man who had been attacked had been found.

"One of the witnesses asked the police if they had found the guy who was screaming and the policeman replied 'yes, he's here and he's ok'. But it wasn't the guy, it was his friend, who tried to stop it and as a result got hit over the head with something."

The rave was promoted through entries on the social networking site Facebook and was billed as a "peaceful and enjoyable camp out" with music.

A Gwent Police spokesman later issued the following statement about the rave:

"We attended an incident on the borders of the Gwent and Gloucestershire Police area and found a gathering of a small group of people.

"No offences were committed and following police intervention the crowd dispersed.

"No complaints of attacks on anyone were reported by any persons. Understanding that that the incident was in the Gloucestershire Police area we made the necessary referrals to the Gloucestershire Police for ongoing inquiries."