Extensive blackout in Tokyo, affecting trains, govt offices

TOKYO - An extensive blackout has struck Tokyo, affecting some government offices and halting trains in the Japanese capital.Tokyo Electric Power Co., a utility serving the Tokyo region, said officials are investigating the cause of Wednesday's blackout that broke out in the afternoon.The company, known as TEPCO, said smoke was detected at its power substation in Niiza city, near Tokyo, and officials are looking into the cause of the incident and whether it's related to the blackouts.Footage on