Two teens wearing black balaclavas pushed an 11 year old girl off her bike and stole it.
Jersey Police say the alleged robbery happened between 6 - 6.30pm on Friday (5 September).
The 11 year old girl had been riding along the cycle track in St Brelade, near Creepy Valley. She suffered an injury to her finger.
The bike was later found damaged.
Officers want to trace two suspects, believed to be boys aged 14 or 15.
Both were dressed in black, with black balaclavas covering their faces. One had blue eyes and the other brown eyes.
They were both wearing Nike trainers - one in Air Max, the other with black Nike 95s.
They had an electric scooter with them.
SoJP said: "Anyone with any information is asked to contact police on 612612 or the independent charity Crimestoppers anonymously on 0800 555 111 or via their Anonymous Online Form at Crimestoppers-uk.org."

Jersey Airport apologises after security delays led to missed flights
New project to discover prehistoric landscape near La Hougue Bie
Oldham breaks Island Record in Commonwealth Games 100m heats
Jersey teen taking on 'Journey of Hope'
Channel Islander abandons Bordeaux as the flames 'arrive at the city's gates'
Man in hospital after serious assault at Havre Des Pas festival
No increase in domestic abuse reports in Jersey during World Cup
Nowacki wins Jersey’s first Commonwealth Games medal in 36 years