"Cordons are in place and officers remain at the scene".
The force tweeted: "Southgate Tube station is now closed whilst officers respond to a suspicious package".
Trains are now not stopping at Southgate Tube station due to concerns over the suspicious package.
British Transport Police said the Southgate Tube station was closed while police investigate a suspicious package.
A small number of people have been treated at the scene by London Ambulance.
Police said they had been called to reports of an explosion and people running at Southgate station at 7.03pm local time on Tuesday.
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The Express reports that, according to the Metropolitan Police, officers are working to establish the cause of the blast.
It is understood some people have been injury but not seriously.
"We will update with more info as we get it".
"Do not think this is fear mongering or fake news".
He told the Standard: "The police moved us on, but they said there was an explosion in the station".
Met officers are dealing with a suspicious package at #Southgate tube station.