Service is down in both directions because of an overhead wire problem at Cole and Carl streets that was reported around 2:30 p.m., Muni spokesman Paul Rose said.
On the N-line, shuttles are in place between the Van Ness Station and Carl and Cole streets. Those heading downtown can also take the 6-Parnassus, 29-Sunset, 43-Masonic and 71-Haight/Noriega buses.
Service on the J-Church line is also affected.