An official at the local expressway traffic police unit close to the tunnel collapse in Japan has told AFP:
We have limited information on the accident at the moment but smoke is said to be coming out from the tunnel as an unspecified number of vehicles were burning.
According to AFP, a reporter for public broadcaster NHK said the tunnel began to cave as he drove through it on his way to Tokyo. He was quoted as saying:
I managed to drive through the tunnel but vehicles nearby appeared to have been trapped. Black smoke was coming and there seemed to be a fire inside the tunnel.