LONDON (REUTERS) - British police said on Tuesday (June 19) that a blast at an underground station in north London was unlikely to be terror-related but investigations were ongoing.

"Enquiries continue but we do not believe this to be terror- related at this time," British Transport Police said on Twitter.

They also said a"small number of people" were receiving medical treatment after what they described as a minor explosion at Southgate underground station.

Earlier, British police tweeted that they were investigating the cause of the explosion and were advising people to avoid the area.