On the heels of two Muni messes, SFist's Leanne Maxwell tell us about another meltdown currently in progress. A broken-down inbound train in the tunnel between Duboce and Van Ness is causing delays this afternoon. 511 reports, "On Wednesday, March 9th, at 4:05pm, SF Muni reports Inbound delays on the L-Line at Van Ness Station due to mechanical problem."

Please be advised. (Sorry, folks.)