UK police say they have arrested four people after a blast at a construction site in north London, where concrete floor panels were being installed in the wake of the Grenfell Tower fire.
A total of six people have been arrested on suspicion of causing the blast, the Metropolitan Police said in a statement.
Police said they have also issued a safety warning for the area, saying people must stay at least 300 metres away from any construction site, unless there are no other safety concerns.
The blast occurred on Tuesday at the site in Southwark, near to the site of the fire.
There were no immediate reports of injuries.
In a statement on Wednesday, Britain’s Civil Defence said that three people were being treated at the scene and two of them were in critical condition.
The Civil Defence and Fire and Rescue Service were called to the scene shortly before 10am and began assessing the damage.
A spokesperson for the Met Police said: “There were reports of an explosion at the construction site and we have received information of an individual with a gunshot wound to the chest.”
The investigation is ongoing.
We will provide further updates as they become available.
“More to come.