There have been "multiple casualties" after a large explosion at a warehouse at a waste water treatment works near Bristol. Avon Fire and Rescue Service said they were called to reports of the blast on Kings Weston Lane, Avonmouth, and have been joined at the scene by Avon and Somerset Police officers and South West Ambulance Service medics. An exploded oxygen tank has been suggested as one possible cause at the scene, but this is unconfirmed. One person said on social media: "The bang was so loud." Follow our live blog for all the latest updates.14:35VIDEO: Casualties confirmed after serious incident at warehouse14:25Fire service says 'we are still looking for people' The fire service is still looking for people at the large explosion in a warehouse in Avonmouth and confirmed that multiple people have been injured. In an update, a spokeswoman told BristolLive that there have been multiple people injured in the explosion, but that the outcome is unknown at present. She wasn’t able to release further details at this stage and said they were still looking for people. Emergency services were called to the area at 11.22am and are currently at the scene. Avon Fire & Rescue Service has six crews at the scene of this ongoing incident. They earlier said people had been injured.14:07Large emergency service presence at the scene In a statement, Avon Fire & Rescue Service said six of its crews from the local area were in attendance. It added: “We are currently responding to an incident after being called to a large explosion in Avonmouth.” A ambulance spokesperson added: “South Western Ambulance Service is responding to a serious incident at premises on Kings Weston Lane, Avonmouth, Bristol. “We have attended with multiple resources alongside fire service and police personnel.”14:06 The fire service is still looking for people at the large explosion in a warehouse in Avonmouth and confirmed that multiple people have been injured. The fire service currently has six crews at the scene of this ongoing incident. Avon Fire & Rescue Service - who is leading on this incident - told us earlier that people had been injured and it has now released another update. A spokeswoman said there have been multiple people injured in the explosion, but that the outcome is unknown at present.13:52'Multiple casualties' confirmed following blast There have been “multiple casualties” after a large explosion at a warehouse near Bristol. A fire service spokesman said: “We have been called to a large explosion at 11.22 in a warehouse in Avonmouth on Kings Weston Lane. “Crews from Avonmouth, Southmead, Yate, Patchway, Kingswood and Temple are currently attending. We can confirm there are multiple casualties on site. “We are joined by Avon and Somerset Police and the Ambulance service on site. The incident is ongoing.” Witness Jawad Burhan took a photo showing a tank that had exploded after the blast. He said there was a “helicopter looking for missing people” and police had c
