BEIJING — At least 11 people were killed and 89 hurt Saturday when a Chinese bullet train lost power after being struck by lightning and was hit from behind by another train, knocking two of its carriages off a bridge, state media reported. The official Xinhua New Agency said four cars on the second train also derailed, but it did not say how serious that was. The first train was traveling from the Zhejiang provincial capital of Hangzhou when the accident happened in Wenzhou city at about 8:30 p.m.