THIEVES threatened to stab a man in a Reading park unless he gave up his bike.
The incident took place in Palmer Park around 7pm on Sunday, March 27.
The victim, a man in his 50s, also had his phone and bank cards taken in the robbery.
Thames Valley Police are now appealing for witnesses to come forward.
They said the victim was cycling through the park when two men, one of whom was on a bike, approached him.
They dragged him off the bike and then threatened him, before taking his possessions.
The offenders are both described as white men, aged in their mid to late 20s with skinny builds and both around 5ft 8ins in height.
Both had dirty, short light-coloured hair and were wearing dark coloured clothing and baseball caps.
They also both had disposable blue face masks.
The victim suffered a minor back injury as a result of the attack, but he did not require any hospital treatment.
His bike is described as black with green writing on the tubes.
Investigating officer Detective Constable Sophie Connor, based at Reading police station, said: “I am appealing to anybody who was in the area of Palmer Park on Sunday and believes that they witnessed this incident to please contact Thames Valley Police.
“You can do so by calling 101, or by making a report online, quoting reference number 43220133114.
“Alternatively, for 100% anonymity, you can all the independent charity Crimestoppers on 0800 555 111.”