"We are treating this as a terrorist incident," Richard Walton, a commander with the Metropolitan Police Service Counter Terrorism Command, said in a release. "I would urge the public to remain calm, but alert and vigilant. The threat from terrorism remains at severe, which means that a terrorist attack is highly likely."

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Police were called to the station around 7 p.m. The suspect was seen running through an exit and threatening other people with a knife, according to The Telegraph.

An officer used a Taser on the suspect and he was arrested around 7:14 p.m. He is being questioned by anti-terrorism detectives.

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Prosecutor Skandalakis has previously suggested that pursuing criminal charges against President Donald Trump may not be feasible until after he leaves office in 2029. (Craig Hudson/Politico/Bloomberg via Getty Images)

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