– British Transport Police
It looks like a battery in a passenger's device which he had in his bag has overheated, and that is what caused the sparks and smoke to come from his bag.
We don't know what the device is, if it is a laptop or a computer.
He then approached staff and explained what happened. Our officers are on their way to Chancery Lane station to speak to staff and get his details.
We are not treating it as a suspicious incident, and nobody was hurt.
@bbcbreaking Tube: Smoke and sparks coming from cannister in carriage at Chancery Lane. Crying girlfriend thought she would die.
Stuck at Chancery lane, smoke everywhere something went off in a mans bag on the tube. Everyone screaming and running. Horrible experience ?
Unpleasant start to the morning at Chancery Lane station this morning as everyone ran off the train screaming about smoke leaking from a bag
Commuters fled a busy Tube station in panic today after a passenger's electrical device overheated, causing sparks and smoke to pour out of his bag. Passengers screamed and ran out of Chancery Lane station in central London while others were in tears following the security scare at 9.30am.
A British Transport Police spokesman said the man who owned the device immediately got off the Tube and spoke to staff after he realised his device was smoking. They said no one was hurt in the incident, and it is not being treated as suspicious.