During footage of the stand-off between police and a knife-weilding man who slashed two people at the Tube station, the Londoner can be heard repeatedly yelling: "You ain't no Muslim bruv!"
The man's words have been widely quoted on social media, with many saying the attacker's actions represented only the work of a killer rather than someone showing their support for Syria.
#YouAintNoMuslimBruv: How Twitter responded to Leytonstone attack
https://t.co/PjSkDqOkOl
— Eddie Izzard (@eddieizzard) December 6, 2015
Counter-terrorism police in Britain are investigating the attack at Leytonstone Underground in East London in which a man brandishing a knife injured two people and reportedly said "This is for Syria."
Terrorist are the enemies of humanity & do not represent any faith.
#YouAintNoMuslimBruv
— Gulamshabir Arif (@GulamshabirA) December 6, 2015
Sometimes I am SO proud to be a Londoner. #YouAintNoMuslimBruv
— Chimene Suleyman (@chimenesuleyman) December 6, 2015
Police arrested the 29-year-old man and said they are treating the "violent unprovoked knife attack" as a "terrorist incident."
Richard Walton, chief of Scotland Yard's counter-terrorism command, said the decision was made because of information received from witnesses and subsequent police investigations. The force said it was searching a residential address in east London, but declined to say whether they were looking for other suspects.
British media widely reported that the suspect linked his actions to Syria after the attack. The claim could not be independently verified, but the incident comes just days after Parliament approved British airstrikes on Islamic State group targets in Syria.
Like many other European countries, authorities in Britain are already on edge after Islamic extremist attacks in Paris last month left 130 people dead. The last extremist attack in Britain was in May 2013, when two British-born, al-Qaeda-inspired extremists stabbed an off-duty soldier to death on a busy London street.
Video shot by witnesses at the scene showed a pool of blood on the station's floor as the suspect was seen lunging at several police officers who tried to subdue him. He was then pinned down after a stun gun was used.
Salim Patel, who runs a shop at the station, told reporters the suspect punched and kicked a man before stabbing him.
The suspect remained in custody at a police station Sunday.
Britain's national terrorism threat level remains at "severe", meaning that authorities believe an attack is highly likely.

