Damaged power lines halted or delayed hundreds of high-speed trains Monday and inconvenienced about 330,000 passengers, railway officials said.

An official said about 1,625 feet of the overhead cable that supplies power to the trains was found loosened, probably damaged by a train that broke seven of its eight trolley arms before coming to a stop near Kobe in western Japan. As a result, 59 trains were canceled and another 275 were delayed, some for nearly eight hours, he said.The official, who spoke on condition of anonymity, said no passengers were on the damaged train but that about 330,000 passengers, including many vacationers taking advantage of a three-day weekend, were delayed.

Normal train service resumed after about eight hours, the official said.