The site of a gas explosion last night is now fully safe, according the operators.

Lightning struck a digester tank at a Severn Trent Green Power plant in Cassington at around 7.20pm on Monday, igniting the biogas inside.

Residents saw 'a fireball' light up the night sky while the massive explosion could be heard from 20 miles away.

READ MORE: Drone images show damage at site 'hit by lightning strike'

The Chipping Norton-based company confirmed that no-one was injured in the blast - but told users to stay away from the site on Tuesday.

This morning, Oxfordshire Fire and Rescue Service said firefighters had been at the scene all night and were still on site.

Oxford Mail: Severn Trent site day after gas blast

A spokesman said: "However there are now two appliances and a hydraulic platform on the scene compared to the six crews and other support vehicles at the height of the incident yesterday evening.

"The fire is under control and did not spread."

Aerial footage from a drone showed the full extent of the damage caused to three of the five tanks used to process food waste at the plant.

Oxford Mail: Explosion at Severn Trent Green Power Plant at Cassington

A Severn Trent Green Power spokesman said: "Following the lightning strike at our plant in Cassington last night, the site has been fully contained and made safe. 

"We'd like to thank the emergency services for their support and will continue to work with them throughout the day."