KRON 4 reports that a shooting occurred at 16th and Folsom Streets today around 10 am in San Francisco's Mission District. No word yet on any injuries or arrests.

The 12-Folsom Muni line has also been disrupted. KCBS reports: "16th Street is closed in both directions between Folsom and South Van Ness Avenue due to police investigation."

We'll update as soon as we know more.

UPDATE: The Chronicle has more: "A 22-year-old man was shot and wounded this morning while getting off a Muni bus in the Mission District, police said. The man suffered serious but non-life-threatening injuries in the 9:30 a.m. shooting at 16th and Folsom streets, police said. His name has not been released."