Police said Wednesday that at least 20 people, presumably dead, are still in the first two cars of the train that rammed a condominium here Monday, raising the prospect that the death toll could top 100.

The toll from the rush-hour crash on the JR Fukuchiyama Line had risen to 96 dead -- 53 males and 43 females -- and 456 injured by Wednesday afternoon, as rescuers pulled more bodies from the wreckage.

Police and firefighters had been trying to locate survivors by using equipment that uses electromagnetic waves to detect heartbeats.