A group of teenagers were reportedly threatened with a knife before being punched and hit and having their belongings stolen in Flackwell Heath.

Three teenagers were walking along Sheepridge Lane when a silver car drove past and shouted at them at around 6pm on Saturday, May 30.

The teens crossed the road and walked down the track leading to Pigeon Farm but the car turned around and drove back towards them.

Five men got out the car and grabbed one of the teenagers, holding a knife to his stomach and demanding he hand over his belongings.

The other two teenagers were also told to hand over their valuables - and one was punched in the head and hit with the handle of the knife.

The terrified teenagers handed over bags, mobile phones, wireless headphones and sunglasses and the robbers got back in the car and headed in the direction of the centre of Flackwell Heath.

The first robber was described as a white man aged between 17 and 22, approximately 6ft tall and of an average build.

He had scruffy, dirty blonde hair. He was wearing a black t-shirt, black joggers and a black balaclava.

The second is described as a skinny Asian man aged between 17 and 22, around 5ft 7ins to 5ft 10ins tall and had short black hair.

He was wearing a red and black tracksuit and a red baseball cap.

The third robber was a white man aged between 17 and 22, approximately 5ft10ins to 6ft 2ins tall and of an average build.

He had black curly hair and acne on his cheeks. He was wearing a white t-shirt and jeans with a dark coloured face covering.

The fourth is described as a white man aged around 17 to 22 and was wearing a beige t-shirt.

The fifth was a man also aged 17 to 22 and was wearing a dark tracksuit.

The vehicle involved is described as a grey or silver saloon car.

Four people have so far been arrested in connection with the robbery - an 18-year-old man from Milton Keynes, an 18-year-old man from High Wycombe, a 19-year-old man from Thame and an 18-year-old man from Knotty Green.

They have all been bailed.

Investigating officer PC Andrew Cummins, based at High Wycombe police station, said: “This was a distressing incident for the victims and I would like to encourage anyone who has any information about this incident to get in touch.

“I am particularly keen to speak to a dog walker who I believe was in the area at the time of this offence and may have seen or heard something that could help with this investigation."

Call 101, make a report online quoting reference 43200160299, or call Crimestoppers on 0800 555 111,