The attack and robbery was reported around 8:45 p.m. Monday in the area of Market and Sixth streets, where the 26-year-old victim was riding his motorcycle when a man approached him and tried to stab him, San Francisco police said.
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The victim got off the motorcycle and retreated, but when the suspect got onto it to try to steal it, the victim tried to intervene and was stabbed with a knife. The suspect then fled on the motorcycle, according to police.
The victim's stab wounds are not considered life-threatening. A detailed description of the suspect was not immediately available.
Anyone with information about the case is asked to call the Police Department's tip line at (415) 575-4444 or to send a tip by text message to TIP411 with SFPD at the start of the message.