Four people were killed Thursday following a large explosion at a waste water treatment works in Avonmouth, near the southwestern city of Bristol in western England, local police confirmed, Trend reports citing Xinhua.
The victims include three employees of Wessex Water, and one contractor, according to the police.
The explosion is not being treated as terror-related and is believed to have involved one of the chemical tanks at Wessex Water's Bristol water recycling centre.
In its latest tweet, Avon and Somerset Police said that "there is not believed to be any ongoing public safety concerns following the incident this morning."