Greenwich blaze: Police investigating Studio 338 nightclub fire
Police are investigating a fire in south-east London which left one man in a critical condition in hospital.
The man, in his 20s, was taken to hospital and the Metropolitan Police said he was left "fighting for his life".
Police were called to Studio 338 on Boord Street, Greenwich, by the London Fire Brigade at 11.55 BST.
Fire crews are still damping down the fire.
They are having to damp it down from outside the nightclub as the building is too structurally unsafe for them to enter.
Fourteen men were initially arrested on suspicion of arson but were released without charge later on Monday.
Cordons are still in place at the scene and police said inquiries were continuing but the southbound Blackwall Tunnel was reopened around 06:00 BST.
About 100 firefighters tackled the fire and plumes of smoke could be seen for miles across the city.
London Fire Brigade said a large part of the ground floor of the nightclub and part of its first floor had been alight.
A nearby industrial warehouse nearby also caught alight as well as scrap paper processing yard, containing a number of outbuildings.
Station manager Andy Walton said firefighters were making "good progress" but that there was still a lot of smoke coming from the fire.
"We are still advising people to avoid the area if possible and for those living nearby to continue to keep their doors and windows closed as a precaution," he added.