Officers were called to the scene shortly after 7pm this evening following reports of people "running" from Southgate station. "We are not aware of any serious injury".
The station, about eight miles from central London, was closed and the area cordoned off amid reports of a suspicious package.
The station is now closed, and officers are on the scene.
The incident comes as officers investigated a suspicious package.
A "small number of people" are receiving medical treatment after what British police are describing as a minor explosion at an underground station in north London.
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They are created to carry between eight and 16 passengers, or a single passenger vehicle, according to the company. This new train would take less than 15 minutes. "Almost like an autonomous, underground, multi-level auto system".
Darren Yarlett, 36, was driving home in Southgate but police had cordoned off roads near the station.
A London Ambulance spokesperson said: "We were called today at 19:02 BST to an incident at Station Parade, N14".
Scotland Yard said later that the cause appeared to be a "battery short circuit".
Enquires are ongoing to establish the "full facts", a Met spokesman added.