A battery short circuit caused a small explosion at a London Underground station that injured five people Tuesday evening (local time), authorities said. Chris Sampson/Flickr (CC)

The Metropolitan Police has said it believes a "battery short circuit" is to blame for a "minor explosion" at Southgate Tube station in North London on Tuesday evening that left several people injured. London Ambulance Service tweeted that its responders treated three people at the scene for minor injuries and two people were transported to hospitals. A spokeswoman said: “We have treated three patients at the scene for minor injuries and have taken two people to hospital.”

The Metropolitan Police said: “It appears at this stage that the cause of the explosion was a battery short circuit. Several people were treated for injuries after a reported minor explosion in the Southgate station of the London Underground rail network, the British Transport Police said Tuesday. Five people needed medical treatment after the incident, described as minor explosion, at Southgate station in north London on Tuesday evening.Police said there was no indication of terrorism and it was believed to have been caused by a faulty drill battery.
Following a battery short circuit causing an explosion a London Underground station last night, a 26-year-old man is arrested and bailed on suspicion of causing it deliberately to cause damage or endanger life. Metropolitan Police counterterror investigators hand the probe back to British Transport Police, concluding the incident which injured five was not a terror attack.