Parkfield Road and Harlesden Road and residents were escorted to their homes by police.

(Image: @kieranmckenna1 /Twitter)

During the operation, a female, who is one of the subjects of the investigation, was shot by police and four other people were arrested.

The woman, aged in her twenties, was taken to hospital by London Ambulance Service.

Due to her condition, she has not been arrested at this time and remains under police guard at hospital, a force spokesman said.

(Image: Liam J Curtin / eyevine) (Image: Liam J Curtin / eyevine)

No other injuries have been reported.

A 20-year-old man was arrested near to the address, while a boy aged 16 and a woman aged 20 were arrested at the property itself.

A 43-year-old woman was arrested in Kent a short while later.

All four have been arrestedon suspicion of the commission, preparation and instigation of terrorist acts under section 41 of the terrorism act 2000.

They are currently in custody at a south London Police station.

(Image: Tim Anderson / Daily Mirror) (Image: Tim Anderson / Daily Mirror)

Police said the property and people connected to it had been "under observation by counter-terrorism officers as part of an ongoing intelligence-led operation".

Further searches at linked addresses across London are under way, although Scotland Yard did not reveal the locations.

Following the shooting of the woman, who was "one of the subjects of the investigation", the incident has been referred to the Metropolitan Police's Directorate of Professional Standards and the Independent Police Complaints Commission (IPCC) "as a matter of course", Scotland Yard said.

(Image: Tim Anderson / Daily Mirror) (Image: Tim