Essex fire crews tackle blast at chemical unit in Thurrock 26 September 2013 Last updated at 22:23 There has been an explosion at an industrial chemicals unit in Essex, fire crews have said. Emergency services were called to the incident at Industrial Chemicals Ltd in West Thurrock, Essex, on Stoness Road, at about 20:00 BST. There are no reports of any serious casualties, Essex Police said. Crews said there appeared to have been an explosion in the chlorine scrubbing unit, which led to a leak of caustic soda liquid. Residents living nearby were advised to stay indoors and keep their windows closed, but at 22:00 BST the police said the area had been made safe and there was no longer any danger to the public. The cause of the explosion would be investigated by the relevant authorities, police said. The fire service said it had treated a man for minor injuries to his shin, but he had not needed an ambulance.