A MAN WIELDING a large knife has been arrested in London after allegedly stabbing a commuter on the city’s underground.

A man shown in a video obtained by Sky News wielding a large knife was tasered before being arrested, Met Police said.

Sky News reports that the man shouted “This is for Syria” before stabbing the commuter.

Another bystander heard in the video shouts “You ain’t no Muslim, bruv”.

A Scotland Yard spokesperson said that police were called at around 7pm today to a report of a stabbing at Leytonstone underground station.

“The male suspect was reportedly threatening other people with a knife. A man was arrested at 7.14pm and taken to an east London police station where he remains in custody.”

One victim sustained a stab wound to the neck, while two others were injured.

Commander Richard Walton, who leads the Met’s Counter Terrorism Command, said:

We are treating this as a terrorist incident. 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.

“I would appeal to anyone who was in the vicinity of Leytonstone underground station earlier this evening at around 7pm who saw anything suspicious to call the Anti-Terrorist Hotline on 0800 789 321.