Police are hunting a robber who attacked an 18-year-old man as he walked home through Sheffield.
The victim’s wallet was stolen when he was attacked on Hunter House Road, Hunters Bar, at 12.30am on Monday.
Later that day, a man was robbed by a youth on a BMX bike who threatened him with a knife on Machon Bank Road, Nether Edge, at about 9.05pm.
The robber, who was wearing dark clothing, is described as white, about 17 and about 5ft 7in.
Both street robberies are now under investigation.
Police want to speak to witnesses, anyone in the areas at the time the robberies were committed or anyone with information.
■ Anyone with information is asked to call officers on 101.