London, December 6

A man was being held in custody today after three people were stabbed at a London Underground train station in an attack police were treating as a “terrorist incident”.

One witness shouted “You’re no Muslim” at the suspect as he was pinned down by officers at a suburban police station, amateur video footage showed, while a pool of blood was seen in the ticket hall.

Sky News reported that witnesses had said the lone suspect spoke of Syria and had “apparently shouted ‘this is for Syria’,” although it did not quote anyone.Police could not confirm the report when contacted by AFP and it is not evident from video footage circulating online.

Saturday’s attack came at the end of a week in which the British Parliament voted to extend air strikes on the Islamic State group from Iraq into Syria.

The stabbings also come less than a month after the November 13 jihadist rampage in Paris, claimed by IS, which killed 130 people.

Police said one man sustained serious knife injuries in the east London attack, but they were not thought to be life-threatening, while two others sustained minor injuries. Britain’s Counter-Terrorism Command is investigating. “We are treating this as a terrorist incident,” CTC leader Richard Walton said in a statement.

Amateur video showed a pool of blood and bloody footprints at the ticket gates of Leytonstone Tube station.

Shouts are heard as the suspect is seen remonstrating with people before swinging at one of them.

Footage shows officers shouting “Drop the knife!” and firing Taser electric stun guns, one of which connects.

“Who is this idiot?” one onlooker said of the suspect, adding: “Yes! Stupid idiot,” after the man is Tasered.

Officers shout “Put the knife down!” and “Drop it now!” at the stunned man, who did drop the short-bladed knife as he quivered on the ground. On his front, the man was handcuffed behind his back while another officer pinned him down with his knee and passers-by were told to get back.

One man then shouted at the suspect: “You ain’t no Muslim, bruv! You’re no Muslim, bruv! You ain’t no Muslim!”

The hashtag YouAintNoMuslimBruv was trending on Twitter today as people reacted to the news.