Terror police in Madrid have tasered and shot an 18-year-old knifeman who allegedly stabbed three people in a terrifying street attack.

The teenage suspect also reportedly tried to attack officers as he recited verses from the Quran.

The horror incident happened in the district of Puente de Vallecas on Saturday before the suspect fled the scene and holed up in a flat, sparking a police siege.

He was taken to the Spanish capital’s Gregorio Maranon Hospital where he was believed to remain under police guard this morning. Witnesses told police he had been wielding a two-inch knife.

An elderly lady is said to have suffered injuries around her neck and two other men, one of whom suffered severe injuries in his chest.

The suspect's brother reportedly rang the police to say he was holed up i

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