London Tube Evacuation

There's a lot of confusion on the cable news networks and the print media. The story is rucksack - carriage - smell - people running - London Tube.

From Sky News:

At Warren Street there were reports of shots and a nail bomb explosion. Sky's Crime Correspondent Martin Brunt said police believe this may have been the sound of detonators going off.

Victoria Line train passenger Ivan McCracken told Sky News he spoke to an Italian man who witnessed an explosion just after the train arrived at the platform.

"He told me he had seen a man carrying a rucksack which suddenly exploded. It was a minor explosion but enough to blow open his rucksack. Everyone rushed from the carriage. People evacuated very quickly. There was no panic.

"I didn't see anyone injured but there was shock and fright.

"There was a smell of smoke."

"The man who was holding the rucksack looked extremely dismayed."

One witness told Sky News that passengers tried to prevent a man with a rucksack running away but they failed.

No reports of casualties thus far.