A teenage boy was almost hit by a car in a robbery in Sulham Hill near Tidmarsh.
The incident occurred around 2.50pm on Saturday, November 16 when a green Subaru drove towards the boy, causing him to jump off his bike to avoid a collision.
An occupant in the Subaru then got out, took the bike, and rode away.
The car drove towards the woods, where another occupant got out and chased three others on bikes, but they managed to escape.
The first offender is described as a white man, around 6ft tall, of average build, with slick black hair.
He was wearing a chequered shirt, a dark green gilet, and jeans.
The second offender is described as a white man, around 6ft tall, with slicked back brown hair.
He was wearing a chequered shirt, a brown gilet, and jeans.
Thames Valley Police is appealing for witnesses to the robbery.
Detective Constable Molly Holland, of Newbury police station, said: "We are asking anyone with information to please call 101 quoting reference 43240555313.
"Additionally we ask anyone with mobile phone, CCTV, or dash-cam footage to get in touch with the force in case it has captured something which may assist this investigation."
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