SAN FRANCISCO (CBS SF) – Family, friends and coworkers were mourning the death of a 29-year-old Apple analyst and local club DJ who lost his battle for life after being stabbed along with friend by a mob outside a San Francisco nightclub last week.

San Francisco police said Joseph Razo’s death was now a homicide investigation.

Razo, 29, died of his injuries at a hospital Tuesday night following a stabbing in the early hours of Jan. 25, according to the San Francisco medical examiner’s office and police.

Police said Razo and another victim were stabbed during a fight with six men and a woman, all in their 20s, that occurred in the area of Sutter and Taylor streets around 1:45 a.m.

Sgt. Dennis Toomer said no suspects were in custody and homicide investigators were asking any witnesses to come forward.

Anyone with information about the case is encouraged to call the Police Department’s anonymous tip line at (415) 575-4444 or to send a tip by text message to TIP411 with “SFPD” in the message.

Razo’s death has left family and friends stunned.

“He was my beautiful man,” Razo’s girlfriend of two years, Rhian Humphries, told the San Francisco Chronicle. “It’s beyond surreal. You don’t expect something like this to happen to someone you care about.”

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