they don t know if something touched the third rail and then also touched the track. they know the arcing caused the explosion and resulting smoke. fire officials say the paramedics treated one person for possible smoke inhalation. b.a.r.t. says the trains were delayed for half an hour, but now the trains are running on schedule. b.a.r.t. also says the incident was caused by equipment failure and a brake overload on the train. reporting live in san francisco, abc-7 news. ama: an acid spill in san rafael lead to four people going to the hospital. it happened shoortly an noon. as sit was spilled inside a garage. two adults suffered unknown injuries and were taken to the hospital. two children within if them. muiratic acid is an industrial cleanser and is use that in swimming pooling. alan: in newark a man had a practicing maintain woman barricaded with him in a motel room for hours. reporter: this is a standoff that ended with the suspect coming out with his hands up.