Update May 5, 10:50 a.m.: Mission Local has independently confirmed that Courtney Brousseau died on Monday. An outpouring of grief followed on Twitter Monday evening, a sign of his popularity among transit advocates, tech workers, and civic leaders.

Update May 4, 11:45 a.m.: Multiple friends and media reports have identified the 22-year-old victim as Courtney Brousseau. Brousseau is a local transit advocate, Twitter employee, and recent UC Berkeley graduate. As of Sunday afternoon, he was on life support, according to a friend. Brousseau Tweeted just before the incident:

Despite multiple requests, the San Francisco Police Department has not provided additional information on the incident or the victims’ conditions.

Original post:

Two men were wounded in a shooting near 14th and Guerrero streets at around 8:22 p.m. Friday, according to police. One sustained life-threatening injuries and the other non-life-threatening injuries.

Police responded to a report of a shooting in the area and located a man who was unresponsive and suffering from a gunshot wound, said San Francisco Police Department spokesman Officer Adam Lobsinger. “That victim was transported to a local hospital with life-threatening injuries,” he said. Police found another victim at the scene with non-life-threatening injuries, who was “privately” transported to the hospital. He said the department has “no suspect info at this time.”

The incident remains active, he said, and asked anyone with information about the incident to contact the SFPD.

Witnesses writing on Twitter described hearing many gunshots around the time of the incident. “We heard tens of shots and then people screaming run run run,” tweeted Cansu Çolakoğlu.

“We heard it too. That was a lot of gun fire,” tweeted Pat Daday.

Update May 2, 9:23 a.m.: Lobsinger said that the man in critical condition is 22-years-old, and remains at the hospital. The victim who suffered non-life-threatening injuries is 17-years-old.

A witness described seeing from their window three men shoot and drive away in a white car. “I saw them, thought it was a fireworks [sic] for the Thank You Hour for first responders,” the person said in an email, “but just a drive by.”

Photo of the aftermath.