Greenpeace activists have reportedly blocked entrances to BP's headquarters in London.

The environmentalist organization tweeted on Monday morning: “We've just shut down @BP_plc's offices in central London. This is a #ClimateEmergency.”

Greenpeace on said its activists were blocking entrances to BP's London HQ.

“[The activists] have set up camp inside specially designed containers. BP can't continue as if it's business as usual in this #ClimateEmergency we're in. #BPshutdown,” Greenpeace tweeted.

The group has said its activists are “prepared to stay there until BP agrees to stop searching for new oil & gas and take the #ClimateEmergency seriously.”

Offshore Energy Today has reached out to BP seeking comment and confirmation of Greenpeace's claims of the shutdown of BP's offices.

A BP spokesperson responded:”We welcome discussion, debate, even peaceful protest on the important matter of how we must all work together to address the climate challenge, but impeding safe entry and exit from an office building in this way is dangerous and clearly a matter for the police to resolve as swiftly as possible.”