UK police investigating cause of "minor explosion" at underground station in London

British police said on Tuesday they were investigating the cause of a “minor explosion” at Southgate underground station in north London and were advising people to avoid the area.

“Enquires are ongoing to establish the cause of a reported minor explosion,” the Metropolitan Police said on Twitter. “We are not aware of any serious injury.”

Reporting By Andrew MacAskill; Editing by Gareth Jones