Battery 'appeared to overheat' sparking Tube panic

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.