Cable car driver stabbed in Chinatown

A cable car conductor was stabbed late Sunday afternoon in Chinatown on Mason Street near Jackson Street. Police said  a witness led them to a suspect on Himmelmann Place, where officers discovered fresh blood on a handrail of the building where they arrested George Luong, 32, in his apartment.

Luong was arrested on suspicion of attempted murder. The conductor was sent to San Francisco General Hospital where police decribed his condition as life-threatening.

"We do not know what started the incident," police spokesman Lt. Troy Dangerfield told the San Francisco Examiner.

Three of Luong's family members were also arrrested at the home for interfering with the investigation, according to police officials.

SF Public Press Social Media Editor Sarah Fidelibus reported that Muni recorded 98 assaults on operators for fiscal year 2010, and documented 45 threats on operators.

The conductor's identity and current condition remain unknown.