According to SFGate, "Two of San Francisco's historic F-line streetcars and a car have crashed, injuring an unknown number of people and causing Muni to suspend train service at the height of the evening commute. KTVU claims that "[t]he crash happened at about 5:45 p.m. when a passenger vehicle somehow became sandwiched end-to-end between two of the historic streetcar that operate on the F-Market line." (Speculation time: Maybe this had something to do with it?)

Bus shuttles are being used to to service riders on Market Street.

This comes just two weeks after the L-Taraval hit another Muni train at West Portal.