An early-evening mugging on a busy stretch of Market Street left a a man injured Thursday, beaten and robbed just steps from San Francisco's Westfield Centre mall.

Police say that the 49-year-old man was on the 800 block of Market Street, which is between Fourth and Fifth Streets, at 6:44 Thursday night when the attack occurred.

According to the San Francisco Police Department, "an unseen/unknown suspect" struck the man "multiple times," then robbed the man of his wallet.

Inside the wallet, according to the SFPD, were the man's identification, his payroll check, and an undisclosed amount of cash. The thief took it all, fleeing as mysteriously as he or she arrived.

The victim was injured seriously enough that he required transport to an area hospital, where he remains in stable condition as of Friday morning.

The suspect, about whom police had no additional information as of publication time, remains at large.

Related: SF's Most Criminal Block Is [Drumroll] Market Between 4th And 5th