A TEENAGER terrorised school staff after having his bicycle confiscated and caused £2,500 damage to a coach.

The 15-year-old threw stones at teachers and buildings and damaged a coach as he went on the rampage at Nunnery Wood High School, Worcester magistrates heard yesterday.

The first-time offender has been warned he is likely to serve a custodial sentence for his crimes.

The Worcester youth, who cannot be named for legal reasons, hit headteacher Alun Williams in the chest with a stone and rode into another teacher at full speed on his bike, said Mike Cowley, prosecuting.

He said the teenager went to the school on Thursday, July 10 and started cycling around on the premises.

Mr Cowley said he rode straight into one teacher, grazing his leg. The teacher struggled with him and took the bike off him, at which point the youth became angry.

He threw a stone at a second teacher, hitting him on the hand as he covered his face.

Mr Williams then intervened, and received the same treatment.

"He threw a stone which hit him in the chest and ribs," said Mr Cowley. "He kept shouting that he wanted his bike back.

"He was terrorising the school for some considerable time that day."

The youth threw more stones at a coach that was waiting to take pupils on a trip, causing the damage.

Other stones hit a light and a bookcase in the school.

The youngster, who is not a pupil at the school, admitted three counts of common assault and criminal damage offences, and also admitted going equipped for theft in Worcester city centre on Monday, June 2.

Police found him with a rucksack containing bolt-cutters. He spat at a custody assistant while at Worcester police station following this offence.

Mark Sheward, defending, said the teenager had a "chaotic existence" and his mother found it hard to cope.

He said he had been showing off at the school. "He was trying to look big in front of his friends," he added.

Mr Sheward said it was unusual for a first-time offender to commit so many crimes in such a short space of time.

"He has gone the whole hog in one go," he said.

Magistrates adjourned the case until Wednesday, August 20, for a pre-sentence report to be prepared.

They said all sentencing options should be considered.