Collapse of Sasago Tunnel is being blamed on failure of `` anchor bolts '' suggest there was little motorists could do to escape the sudden collapse of the ceiling above them . The bolts secure concrete slabs to the ceiling of the tunnel . Nine people died when concrete slabs fell on traffic on Sunday morning . A total collapse of a bridge in central Japan has killed at least nine people, including two children, and injured more than 100 others.
Collapse of Sasago Tunnel is being blamed on failure of `` anchor bolts '' The bolts secure concrete slabs to the ceiling of the tunnel . Nine people died when concrete slabs fell on traffic on Sunday morning . A total collapse of a bridge in central Japan has killed at least nine people, including two children, and injured more than 100 others.