A boy was threatened at knifepoint and robbed of his bike.

The 13-year-old was in Old Oak, in the Cottonmill area of St Albans, at 4.41pm on Monday (July 1) when he was approached by a man who began threatening him verbally.

He stole the boy's bike, which was bright green with black writing. It's reported that the robber had a knife on him.

He is described as white, in his 20s, of skinny build. wearing a dark navy blue hoody, jeans, and a beanie hat.

Officers are investigating the incident and any witnesses or anyone with information, including those who believe they have seen the bike, should contact Hertfordshire Constabulary on 101 quoting crime reference 41/59402/19.