From Beirut to Sousse: Paris attacks the latest in a string of terrorist massacres around the world
The terror that unfolded in Paris has been described as the worst violence to hit France since the Second World War.
Terrorists have used different methods to inflict destruction around the world in recent years. Here are some of the most horrific attacks in recent times:
Egypt: Russian airliner crashes over Sinai
Kolavia flight 7K9268 went down on October 31 minutes after taking off the Sharm El-Sheikh International Airport, killing 224 people on board, most of them Russians.
The head of Russia's FSB security service, Alexander Bortnikov, told President Vladimir Putin it is now clear the crash was a "terrorist" act, and offered a 50 million US dollar (£33 million) reward for information leading to the arrest of those responsible.
Isis claims its Sinai branch downed the plane in retaliation for Russia's bombing campaign in Syria.
On Thursday, 41 people were killed and at least 239 wounded in two suicide bombings in the deadliest bombing in the capital since the end of Lebanon's civil war in 1990.
The so-called slamic State (IS) militant group claimed responsibility. Hezbollah forces are currently fighting Isis in neighbouring Syria.
2,000 slaughtered in Nigeria
As the world's media coverage focused on the Charlie Hebo attacks in Paris in January this year another terror attack was unfolding. More than 2000 Nigerians were reported to have been killed by Islamist militants Boko Haram.
The attack in Baga in the north-eastern state of Borno was described by Amnesty International as the group's 'deadliest massacre'.
Local authorities said they had given up counting the bodies as more than 30,000 were forced to flee their homes.
Kenya school attacks
147 people were murdered and at least 79 injured in an attack by al-Shabab on Garissa University, Kenya in April.
It was the deadliest assault yet by the Islamist group. Using explosives to blast away the main gate, Islamist militants forced their way into the campus of Garissa University College at 5.30am, shooting dead a security guard before storming a hostel.
As with the Baga attacks, some users on social media questioned the media coverage of this attack and subsequent social media response. Some posts have asked why Facebook didn't offer Kenyan flag filters for profile images.
"When 147 Kenyans were murdered, I didn’t see anybody changing their profile pic," said one user this morning.
Anders Behring Breivik
In 2011 77 people were killed by right-wing extremist Anders Behring Breivik in Norway.
Breivik, who is serving a 21-year prison sentence, confessed to the bomb attack at government headquarters that killed eight people and a shooting rampage at a youth camp on Utoya island where he murdered 69 others.
On August 15, 1998, 29 victims - who included a woman pregnant with twins - died after a dissident republican car bomb detonated in Omagh town centre on a busy Saturday afternoon.
It was the single bloodiest terrorist attack in the history of the Northern Ireland Troubles and came only months after the signing of the historic Good Friday Agreement.
More than 200 were injured when the 500lb car bomb, planted by the Real IRA, ripped through the Co Tyrone market town.
Nearly 3,000 people, including 67 Britons, were killed after Islamist extremists hijacked passenger jets and flew them into New York's World Trade Centre twin towers and the Pentagon in Washington DC on September 11, 2001.
The world watched in horror as the hijacked planes emerged from a clear blue sky to strike at the heart of one of the world's greatest cities.
Televised live around the globe to a shocked audience of billions, the 9/11 attacks were meticulously planned by Islamist fanatics to kill as many people and gain as much publicity as possible.
A total of 202 people, including 28 Britons, were killed on October 12, 2002 and more than 204 injured when the al Qaida-linked Jemaah Islamiyah group detonated bombs at two packed Bali nightspots.
During the attack three bombs detonated - a backpack carried by a suicide bomber and a car bomb which both devastated Paddy's Pub and the Sari Club opposite, followed by a third device outside the US consulate in Denpasar.
Various members of Jemaah Islamiyah were convicted in relation to the bombings. Three - Imam Samudra, Amrozi Nurhasyim and Huda bin Abdul Haq - were executed by firing squad in November 2008.
Madrid train bombings
The whole of Spain was in mourning when more than 190 people were killed in the Madrid train bombs on March 11, 2004.
The attacks took place exactly two-and-a-half years after September 11 and were Europe's worst terrorist atrocity since the 1988 Lockerbie plane bombing.
London-based Arabic language Al Quds newspaper said it received an e-mail from the Brigade of Abu Hafs al-Masri, who claimed its ''death squad'' had penetrated ''one of the pillars of the crusader alliance''.
On July 7, 2005, 52 people were murdered and hundreds more injured when four suicide bombers attacked London's transport network.
Twenty-six died in the bombing at Russell Square on the Piccadilly line, six in the bombing at Edgware Road on the Circle line, seven in the bombing at Aldgate on the Circle line, and 13 in the bombing on the bus at Tavistock Square.
A fortnight later, another four would-be suicide bombers launched failed attacks on the Tube and a bus, leading police marksmen to kill innocent Brazilian Jean Charles de Menezes.
Often called India's 9/11, the Mumbai attacks in 2008 saw 10 gunmen blaze through the country's financial capital, killing more than 160 people.
Indian authorities took back control of Mumbai early on the morning on November 29 after a three-day siege across the city.
Security services and senior police in the UK have repeatedly highlighted the risk of a Mumbai-style roaming gun massacre, and earlier this year police carried out a simulated terror attack in the capital to test the emergency response to such a strike.
Fusilier Lee Rigby, 25, from Middleton in Greater Manchester, was killed outside barracks in Woolwich, south east London, on May 22, 2013 by two Islamic extremists.
The murder sparked shock across the country after the father-of-one was run over with a car and then hacked to death by British Muslim converts Michael Adebolajo and Michael Adebowale.
Following an Old Bailey trial, Adebolajo was handed a whole-life prison term and Adebowale was jailed for a minimum of 45 years.
Paris was rocked by the Charlie Hebdo atrocity on January 7 this year, when 12 people were killed after gunmen stormed the offices of the satirical magazine.
The sense of panic heightened when there was a subsequent attack on a Kosher supermarket, and the incidents triggered worldwide outrage.
Since then there have been a number of more minor strikes or attempts in France. In one, three Americans and a Briton overpowered a heavily-armed gunman on a train from Amsterdam to Paris.
Terror group Islamic State claimed responsibility for the Sousse attack in June, in which 30 Britons were among 38 tourists killed.
Gunman Seifeddine Rezgui opened fire on the holidaymakers on a beach in the Tunisian holiday resort.
Foreign Minister Tobias Ellwood has described the Sousse tragedy as the ''most significant terrorist attack'' on Britons since July 7, 2005.
Life under Isis
- As long as its enemies remain divided the militant group will not be defeated
- Sunnis in Iraq face an even bleaker future if the militants' reign of terror is finally defeated
- How militants overthrew the city of Hit in less than 24 hours
- Story of a former jihadi - why I deserted the 'Islamic State' rather than take part in executions, beheadings and rape