LONDON - Five people were killed and another seriously injured on Wednesday in an explosion at an industrial unit in Lincolnshire, in eastern Britain.

Police, fire fighters and ambulance crews were called to the site. The cause of accident was still under investigation.

"Inquiries are ongoing and will be ongoing throughout the night to establish the cause of this explosion," a police spokeswoman said.

She added that the circumstances at the moment were still unclear, and that there would be a full forensic examination of the unit.