Police granted extra week to question Whitehall terror suspect

Arrest: Armed police arrested the suspect near Parliament: AFP/Getty Images

Terror police have been granted another week to question a suspected knifeman arrested in the heart of Westminster following a targeted swoop.

The suspect, named as Khalid Mohamed Omar Ali, was arrested on suspicion of offences under the Terrorism Act and possession of offensive weapons close to Downing Street on April 27.

Police recovered several knives during the "intelligence-led" operation which took place yards from the scene of the deadly attack by Khalid Masood on Westminster Bridge in March.

Believed to be a British national born overseas who went to school in Tottenham, north London, 27-year-old Ali reportedly joined a humanitarian mission to Gaza in 2010.

Following his dramatic arrest in front of crowds of tourists, he was taken for questioning at a south London police station.

Scotland Yard said he remains in custody, and following a warrant of further detention being granted at Westminster Magistrates' Court on Wednesday, he can be questioned until May 11.