Another taxi driver in Saskatoon has been robbed.

Police are looking for the public's help identifying three passengers who a cab driver said robbed him at knife point.

A photo taken Sunday from the front of the cab was released by police Tuesday. A man in the back seat of the taxi can be seen holding a knife.

Saskatoon police said the cab driver picked up three men around noon Sunday in the 500 block of Avenue P North and drove them to the area of Avenue H and 27th Street.

The cab driver told police the men threatened him with a knife, demanded cash and fled on foot.

There have been more than half a dozen taxi robberies reported in the last few months.