Explosion in illegal drugs factory

A huge explosion in an illegal cannabis factory inside a block of flats at Hornchurch in London required more than 70 firefighters to tackle the blaze it started.

Witnesses said that the front of the flats had been blown across the streets by the blast which police later said was caused by arson with two suspects later arrested.

The explosion was thought to have involved two gas cannisters. A total of 70 people had to be evacuated from the flats and five people were taken to hospital with fire related injuries.