The London Fire Brigade were called to reports of a barbecue fire at the back of Kiwi House in Granary Square in Kings Cross, N1 this evening. The fire has now been brought under control.
Station Manager Richard Welch is at the scene, he said:
"People in the vicinity reported hearing an explosion, which was due to two gas cylinders exploding before firefighters arrived on the scene. Crews have now brought the blaze under control and are cooling a further two gas cylinders down to make them safe. Around 300 people were evacuated from nearby buildings and as a precaution we've set up a temporary safety cordon of around 50 metres.
"Fortunately it doesn't look as though anyone was injured."
Two fire engines from Clerkenwell and Euston fire stations and around ten firefighters are at the scene.
The Brigade was called at 1919.
The Brigade recently issued advice on how to prevent barbecue fires during the Olympics. Fire Commissioner Ron Dobson urged people to take care, especially those who'd had a drink.