A TEENAGER was threatened at gun-point and beaten to the ground in a terrifying armed robbery.

The victim was in an alleyway behind Sunningdale railway station in London Road when a group of thugs approached.

What came next was a shocking attack where the 16-year-old boy was beaten up by the gang, three of whom carried knives while one brandished a handgun.

They then threatened the schoolboy and ordered him strip down by removing his jacket, t-shirt, belt and to hand over his wallet and phone before they fled.

A police spokesman said: "The victim, a 16-year-old boy, was with three friends, two girls and a boy.

"The group were walking through the alleyway when they were approached by a group of four men, who assaulted the victim by punching and kicking him.

"Three of the offenders were armed with knives and the other was armed with a handgun."

The teenager was taken to hospital for treatment for minor injuries but he was later discharged.

Officers investigating the robbery have arrested four teenagers in connection with the case.

They include a 19-year-old man from Ascot who was arrested on suspicion of robbery and released under investigation.

Meanwhile a 16-year-old girl from Bracknell was arrested on suspicion of conspiracy to commit robbery and was released under investigation.

A 16-year-old boy from Bracknell was also arrested on suspicion of robbery and released on bail to appear at Maidenhead Police Station on February 24.

A 16-year-old from Ascot was arrested on suspicion of robbery, possession of drugs and possession of a bladed weapon.

Officers investigating the case have appealed for clues and anyone with information should contact Thames Valley Police on 101.

Detective constable Nicola Tompkins, based at Maidenhead police station, said: "I understand that this incident may concern people but I would like to reassure them that we are carrying out a full investigation and have made four arrests.

"If anyone witnessed this incident, or has any information relating to it, I would like to hear from them.

"Anyone with any details which they think could help our investigation should call the Thames Valley Police non-emergency number on 101."