The Metropolitan Police has declared the killing of Tory MP Sir David Amess as a terrorist incident.
It's the latest in a number of terror attacks that have brought horror to the streets of Britain in recent years.
Sir David, 69, was stabbed on Friday while attending a constituency surgery at Belfairs Methodist Church in Leigh-on-Sea near Southend and died at the scene.
Here are some of the major domestic terror incidents in recent years:
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Lee Rigby murder
May 22, 2013

Fusilier Lee Rigby died as a result of multiple cut and stab wounds after being attacked in Woolwich, south-east London, by extremists Michael Adebolajo and Michael Adebowale.
Adebolajo was given a whole-life term and Adebowale was jailed for a minimum of 45 years.
Jo Cox murder
June 16, 2016

Labour MP Jo Cox was stabbed 15 times and shot three times outside her constituency surgery in Birstall, near Leeds, a week before the EU referendum.
Neo-Nazi Thomas Mair, who shouted “Britain first” in the attack, was given a whole life sentence for the murder.
Westminster Bridge attack
March 22, 2017

Kent-born Khalid Masood, 52, was shot dead by police after he drove a rental car into pedestrians on Westminster Bridge before fatally stabbing Pc Keith Palmer, 48, in the Palace of Westminster’s forecourt.
US tourist Kurt Cochran, Romanian tourist Andreea Cristea and Britons Aysha Frade and Leslie Rhodes were killed.
Manchester Arena bombing
May 22, 2017

British-born Salman Abedi, 22, walked into the foyer of Manchester Arena at around 10.30pm as crowds streamed out of an Ariana Grande concert.
He detonated a device packed with shrapnel, killing 22 people, including children.
London Bridge attack
June 3, 2017

A white van hit pedestrians on London Bridge before three men got out of the vehicle and began stabbing people in nearby Borough Market, leaving eight people dead and 48 injured.
Khuram Butt, Rachid Redouane and Youssef Zaghba were shot dead by police minutes later.
Finsbury Park Mosque attack
June 19, 2017

A group of Muslim worshippers were hit after a van slammed into them near Finsbury Park Mosque, north London, after many of them had attended evening prayers during the holy month of Ramadan.
One person died. Darren Osborne was jailed for at least 43 years after being found guilty of murder and attempted murder.
Parsons Green bomb
September 15, 2017

Ahmed Hassan’s homemade bomb partially exploded on a London Underground rush hour train at Parsons Green, injuring more than 50 people. He was sentenced to life with a minimum jail term of 34 years.
Fishmongers' Hall attack
November 29, 2019

Jack Merritt, 25, and Saskia Jones, 23, were stabbed to death by Usman Khan, 28, at a prisoner rehabilitation event at Fishmongers' Hall.
A man and two women were also injured before Khan, who was released from prison on licence in December 2018, was shot dead by armed officers on London Bridge.
Streatham stabbing
February 2, 2020

Sudesh Amman was shot dead by police after stabbing two people on a busy street in the south London area of Streatham while wearing a fake suicide vest.
Reading park murders
June 20, 2020

Khairi Saadallah, 27, fatally stabbed friends James Furlong, 36, Dr David Wails, 49, and Joseph Ritchie-Bennett, 39, in a knife attack at a park in Reading town centre.
He later admitted the murders and was sentenced to a whole life order in prison.
Sir David Amess killing
October 15, 2021

Tory MP Sir David Amess was fatally stabbed outside Belfairs Methodist Church in Leigh-on-Sea near Southend while attending a constituency surgery.
The Metropolitan Police declared it a terrorist incident and said they are investigating the attacker’s “potential motivation linked to Islamist extremism”.