The killing of a French priest on Tuesday is the latest of a string of attacks against Western targets claimed by or blamed on the Islamic State jihadist group.
Here is a list of recent such assaults.
Attackers slit an elderly priest's throat in a hostage-taking at his church in the Normandy town of Saint-Etienne-du-Rouvray, with another person fighting for their life.
French President Francois Hollande says the two attackers, killed by police, claimed to be from IS, while the group says they were its "soldiers".
A failed Syrian asylum seeker blows himself up outside a music festival in the German city of Ansbach, wounding 15 others. The Bavarian interior minister says the man "pledged allegiance" to IS, while the militant-linked Amaq news agency said he was a "soldier" of the group.
A 17-year-old asylum seeker, believed to have been Afghan or Pakistani, attacks passengers on a Bavarian train with an axe, injuring five people, two of them critically. He is shot dead by police.
IS releases a video the following day purportedly featuring the attacker announcing he would carry out an "operation" in Germany.
Mohamed Lahouaiej Bouhlel, a 31-year-old Tunisian, rams a 19-tonne truck into a crowd celebrating Bastille Day in Nice, killing 84 people and wounding more than 300.
IS said Bouhlel staged the attack "in response to calls to target nations of coalition states" fighting the jihadist group.
A triple suicide attack at Istanbul's Ataturk airport kills 47 people. Authorities blame IS, though there is no claim of responsibility.
A man claiming allegiance to IS stabs a police officer to death before slitting his partner's throat in front of their young son at their home in Magnanville, west of Paris.
A gunman claiming allegiance to IS opens fire inside a gay bar in Orlando, Florida, killing 49 people in the deadliest mass shooting in US history.
Suicide attacks claimed by IS kill 32 people and wound more than 340 at Brussels airport and Maelbeek metro station, near European Union headquarters.
The attackers have links to the cell that carried out the November 2015 jihadist attacks in Paris.
Twelve German tourists are killed in a suicide attack in central Istanbul. On March 19, three Israeli tourists and an Iranian are killed by a suicide bomber at an Istanbul shopping centre. Turkish authorities attribute both attacks to IS.
Syed Farook and his Pakistani wife Tashfeen Malik open fire at a Christmas party in San Bernardino, California, killing 14 people. IS hails the attack, but does not claim direct responsibility.
Coordinated suicide attacks in Paris kill 130 people and wound more than 350 at a concert hall, cafes and the national stadium. IS claims responsibility.
An Airbus passenger jet owned by a Russian company crashes in the Sinai desert after a bomb rips a hole in the plane, killing all 224 people on board. IS claims responsibility.
Gunmen kill 38 people, including 30 British tourists, at a beach hotel in Sousse, a little more than three months after a similar attack at the Bardo museum in Tunis kills 22 people, including 21 foreign tourists. IS claims both attacks.
Gunman Amedy Coulibaly, claiming allegiance to IS, kills a policewoman in a Paris suburb before attacking a Jewish supermarket the next day, where he kills four more people. He is killed in a police assault.
On January 7, the Al-Qaeda-linked Kouachi brothers had killed 12 people at the headquarters of the Charlie Hebdo satirical weekly in Paris.