IN PICTURES: Terror attack at UK parliament

Images from the scene of attack in central London. Warning: some images are graphic and may

One shot, several injured in UK parliament attack in London on March 22, 2017 (credit: REUTERS)
Warning: Images below may be graphic in nature.
A policeman was stabbed, an assailant shot and several people injured on Wednesday close to Britain's Houses of Parliament in what police said they were treating as a terrorist incident. Sky News reported that at least four people have died in the incident.
Scroll down for images from the scene of the attack in central London.

Police tapes off Parliament Square after reports of loud bangs, in London, Britain, March 22, 2017.  (Reuters)Police tapes off Parliament Square after reports of loud bangs, in London, Britain, March 22, 2017. (Reuters)
A man lies injured after a shooting incident on Westminster Bridge in London, March 22, 2017 (Reuters)A man lies injured after a shooting incident on Westminster Bridge in London, March 22, 2017 (Reuters)
Injured people are assisted after an incident on Westminster Bridge in London, March 22, 2017.  (Reuters)Injured people are assisted after an incident on Westminster Bridge in London, March 22, 2017. (Reuters)
Armed police respond outside Parliament during an incident on Westminster Bridge in London, Britain March 22, 2017. (Reuters)Armed police respond outside Parliament during an incident on Westminster Bridge in London, Britain March 22, 2017. (Reuters)
An injured person is assisted after an incident on Westminster Bridge in London, Britain March 22, 2017. (Reuters)An injured person is assisted after an incident on Westminster Bridge in London, Britain March 22, 2017. (Reuters)
A woman lies injured after an incident on Westminster Bridge in London, March 22, 2017. (Reuters)A woman lies injured after an incident on Westminster Bridge in London, March 22, 2017. (Reuters)
A woman lies injured after an incident on Westminster Bridge in London, March 22, 2017. (Reuters)A woman lies injured after an incident on Westminster Bridge in London, March 22, 2017. (Reuters)
An air ambulance lands in Parliament Square during an incident on Westminster Bridge in London, Britain March 22, 2017. (Reuters)An air ambulance lands in Parliament Square during an incident on Westminster Bridge in London, Britain March 22, 2017. (Reuters)
Forensics investigators work at the scene after an attack on Westminster Bridge in London, Britain March 22, 2017. (Reuters)Forensics investigators work at the scene after an attack on Westminster Bridge in London, Britain March 22, 2017. (Reuters)