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Six people hurt in gas explosion Six people hurt in gas explosion
(30 minutes later)
A gas canister has exploded at an industrial site in Hertfordshire, leaving six people injured. A gas canister has exploded at a warehouse, leaving six people injured - one in a critical condition and another unaccounted for.
Fire crews, ambulance and police were called to a warehouse building at the Mundells in Welwyn Garden City at 1500 GMT. Emergency crews were called to the site at the Mundells, Welwyn Garden City, Hertfordshire, at 1500 GMT.
A Hertfordshire Fire Service spokesman said 10 crews are tackling the fire and there are gas canisters inside. Six people, one with life-threatening injuries, were taken to the Queen Elizabeth II Hospital in the city.
Six people, one with life-threatening injuries, have been taken to the Queen Elizabeth II Hospital in the city. Another person is believed to be unaccounted for. Crews are searching the building.
The Mundell one way system has been closed. A Hertfordshire Fire Service spokesman said 10 crews were tackling the fire and there are gas canisters inside.
An East of England Ambulance Services spokesman said one of the people taken to hospital had non-threatening injuries and four were described as "walking wounded". The Mundell one-way system has been closed.
One person is believed to be unaccounted for. Hertfordshire Police said one of the people taken to hospital was seriously injured and four had minor injuries.

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A police spokesperson said that at this stage they "could not confirm whether there had been any fatalities".
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