An investigation is ongoing after a man died days after an assault in San Francisco, authorities said. 

On Jan. 11, officers responded to Ellis Street near Taylor Street around 4:30 p.m., finding a man who was suffering from injuries that looked like he had been assaulted, police said. 

The man was taken to a hospital for life-threatening injuries. 

Officers eventually arrested 33-year-old Willie Smith of San Rafael in connection with the assault. Police said Smith was booked into jail for aggravated assault and possession of drug paraphernalia. 

On Saturday, the victim died at the hospital due to the injuries. 

The San Francisco Homicide Detail is handling the investigation.