SAN FRANCISCO — San Francisco police say one of two people found bound and gagged on a city street with life-threatening injuries has died.

The unidentified man was pronounced dead early Monday at San Francisco General Hospital. He and a woman were found tied up and gagged in the city's Reis-Paul Tract area the previous night.

The man was unconscious, but alive when officers found him. Police spokesman Albie Esparza says the woman was also taken to San Francisco General, where she was clinging to life.

Police have not identified a suspect or motive in the case. Additional details were not available.