A fire broke out at a 12-storey building under demolition near London Bridge earlier.
London Bridge was closed and buses were diverted away from a 12-storey building when fire broke out behind scaffolding.
London Fire Brigade (LFB) sent four fire engines to the blaze on King William Street at about 18:06 GMT.
London Fire Brigade (LFB) sent four fire engines to the blaze on King William Street shortly after 18:00 GMT.
About 10% of the scaffolding on the 10th floor was alight but by 21:05 the fire was under control, LFB said.
Photographs on social media showed flames behind the scaffolding but by 21:00 the fire was under control.
Photographs on social media showed flames behind the scaffolding on the site. There were no reports of any injuries, the brigade said.
At the scene, BBC reporter Alan Soady said: "The building is covered in scaffolding with white netting. You can see that there are flames behind it."
Firefighters were called to the site on the north side of the River Thames, in central London.
There were no reports of injuries but the bridge was cordoned off.
The bridge was completely closed to traffic and pedestrians and buses were diverted.
"They'd have been worried about any burning debris falling down on to the path and the road that's so busy during rush hour," he said.
Earlier, BBC reporter Alan Soady, who was at the scene, said: "The building is covered in scaffolding with white netting. You can see that there are flames behind it.
"It seems, from the many fire engines that are here, they have been bringing it under control."
"But it has had the impact of having to cordon off the whole bridge," he added.
"They'd have been worried about any burning debris falling down on to the path and the road that's so busy during rush hour."
