The victims, who were around 13, were approached in Firth Park, Firth Park, by a slightly older boy armed with a lock knife, who attempted to steal their bike.
The boys managed to flee and the teen with the knife was later detained by the police.
Boys threatened by teen with knife in Sheffield park
Two boys were threatened by another boy armed with a knife in a Sheffield park.
By The Newsroom
Monday, 18th June 2018, 10:31 am
Updated Tuesday, 19th June 2018, 5:08 pm