3 stations affected. Man seen with rucksack that exploded.
INCIDENTS REPORTED NEAR TUBE STATIONS
A series of incidents have been reported near Warren Street, Oval and Shepherd's Bush stations on the London Underground.
The station have been evacuated. Smoke was seen coming from a train.
Speaking to Sky News, one witness who was travelling on one of the trains said a man told him that a passenger carrying a rucksack made an exclamation and then the rucksack exploded.
The witness said: "The doors connecting my carriage to the next burst open and people rushed in. "There was a smell of smoke."
More to follow...