51.   - Heat-sensors at the entrances detect over-heated vehicles as they enter the tunnel.

52.   A decision on allowing trucks to enter the tunnel will be made at a later date.

53.   A Eurotunnel spokesman said the signalling problems were caused by ice and snow on shuttles and cars that melted as they entered the tunnel.

54.   A Channel Tunnel freight train partially derailed Monday as it entered the tunnel at Folkestone, authorities said.

55.   All the victims were civilians who had entered the tunnel minutes before the blast.

56.   All were civilians who had entered the tunnel minutes before the blast.

57.   As he entered a tunnel under the pyramid he aimed a flashlight at the walls -- and started laughing.

58.   But Eurotunnel joint chief Robert Malpas said that, by the time they reported it, the train had entered the tunnel.

59.   Each time people illegally enter the tunnel, trains and platforms must be security checked, which holds up freight traffic, Martos said.

60.   Explosive experts immediately began inspecting the site and were expected to try to enter the tunnel as soon as possible, NHK said.