Multiple people reported hearing a large explosion near the British city of Oxford on Monday evening.
Video and images appeared to show a bright flash, reported the BBC. A huge fireball was seen in the area.
The explosion appears to have been caused by a lightning strike which hit a waste facility.
Residents reported power outages in Witney, Burford, Chipping Norton and Milton-under-Wychwood, following the explosion.
There have been no reports of injuries.
A witness told the Oxford Mail they saw a "strange pulsing sky out of our windows looking northwest of Oxford".
"I'm guessing it's a fire caused by the lightning storm that passed over," the witness added.
Severn Trent Green Power confirmed that at around 7:20 p.m., a digester tank at its facility near Yarnton, Oxfordshire, was struck by lightning, resulting in the biogas within that tank igniting.
“We are working with the emergency services to secure the site and will provide further comments in due course,” the company added.