A taxi driver was threatened with a knife during an ambush on a Sheffield street.
South Yorkshire Police said a car pulled in front of a taxi driver on Parsley Hay Road, Handsworth, and four males got out.
They produced a knife and threatened the driver while making demands for cash before stealing his takings.
A force spokesman said: "A vehicle containing four males pulled in front of a taxi, they demanded money - making threats with a knife - and stole the driver's money."
Witnesses to the incident on Tuesday should call South Yorkshire Police on 101.