Four people have died after a devastating explosion at a water treatment centre.

Emergency services were dispatched to Wessex Water's premises in Avonmouth, Bristol, at about 11.20am.

Avon and Somerset Police confirmed in a statement: "An explosion is believed to have occurred involving one of the chemical tanks at Wessex Water's Bristol water recycling centre.

"A rescue operation was subsequently led by the fire service, involving five appliances and two turntable crews and we can confirm there have been a number of casualties."

An eyewitness told the BBC they heard a "very loud explosion" that "shook buildings".

Another said they saw "around 10 ambulances driving to the scene".

Jawad Burhan told the PA news agency: "I heard the sound, I'm working beside the building in another warehouse.

“After ten minutes I saw the helicopter coming and the police."

This is a breaking news story and is constantly being updated.

Please refresh the page regularly to get the latest updates.

Reporters working on will be working to source the latest information, reaction, pictures and video related to this story.

Or download the Daily Star app for flash alerts on the biggest stories of the day.

Why not also subscribe to receive our regular Daily Star news bulletins? You can do this on this page by simply entering your email address above and hitting 'subscribe'.