A child was threatened for his bike in a knifepoint attack in St Albans.
The 13-year-old boy was verbally threatened and had his bike stolen by a man who is believed to have been carrying a knife.
Police were called at 4.41pm on Monday, July 1 following the robbery on the green in Old Oak.
They searched the area but nobody has yet been arrested.
The offender is described as a white man in his 20s, of skinny build, between five feet, seven inches and six feet tall, with a small light brown beard, and wearing a navy blue hoody, jeans and a beanie hat.
The bike is a bright green Diamondback Heist 1.0 with black writing, with the serial number LY17924469.
St Albans Local Crime Unit Det Con Colin Workman said: "This was a very scary experience for those young boys to have gone through, and we are doing everything we can to stop it from happening again.
"Fortunately, no one was hurt but that does not take away the severity of this incident.
"We're asking anyone with any information no matter how small to get in touch as it could help us conclude this investigation."
If you have any information about this incident or have seen the bike, contact police on the non-emergency number 101 quoting reference 41/59402/19.
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