British police say a blast at an underground station in north London was unlikely to be terror-related but investigations were ongoing.
Police were called to reports of a minor explosion shortly after 7pm local time at Southgate Tube station in north London.
"Enquiries continue but we do not believe this to be terror- related at this time," British Transport Police (BTP) said on Twitter.
The Metropolitan Police tweeted: "Officers remain at #Southgate tube station. Enquires are ongoing to establish the cause of a reported minor explosion at 19:03 hours. We are not aware of any serious injury.
"Enquires are ongoing to establish the cause of a reported minor explosion."
BTP added a "small number" of people had been treated at the scene.
Australian Associated Press