|Tourism is Egypt's most important economic sector accounting for more than
11 per cent of the country's GDP [EPA]
Tourists have been attacked in Egypt before and in the latest incident on Monday, at least 19 people, including 12 foreigners, have been abducted in the country's south.
Here is a chronology of some of the most significant incidents of violence involving foreigners since the early 1990s:
21 October 1992: A British woman is killed and two British men wounded in an attack near Dairut in the south. The woman is the first foreigner to die in such an attack.
26 February 1993: Bomb in crowded coffee shop in central Cairo kills a Turk, a Swede and an Egyptian and wounds 20 others.
8 June 1993: Blast near tour bus on Pyramids Road in Cairo kills two Egyptians and wounds 22 others, including five Britons.
27 October 1993: A man described as a mentally disturbed musician shoots dead two US businessmen, a French jurist and an Italian at a luxury Cairo hotel.
4 March 1994: Armed men fire at a Nile cruiser in southern Egypt, wounding a German woman, who died after being flown back to her country.
26 August 1994: A Spanish boy is killed in an attack on a tourist bus in southern Egypt.
27 September 1994: A German is killed and another wounded in an attack on the Red Sea resort of Hurghada. Two Egyptians were also killed. Another German man died of his wounds after returning to his country.
23 October 1994: A British tourist is killed and three others wounded in an attack on a minibus.
18 April 1996: Eighteen Greek tourists are killed in an attack after being "mistaken for Israelis" near the Pyramids.
18 September 1997: Nine German tourists and their Egyptian bus driver are killed in a shooting and firebomb attack outside the Egyptian Museum in Cairo's Tahrir Square.
17 November 1997: Attackers kill 58 tourists and four Egyptians at an ancient temple near the southern town of Luxor. Six of the attackers and three policemen also die in the violence.
7 October 2004: A series of bombings at the Taba Hilton hotel on Egypt's border with Israel, and two beaches further south, kill 34 people.
7 April 2005: A suicide bomb attack in a bazaar in Old Cairo kills a US citizen, a French man and a woman.
30 April 2005: A suicide attack wounds seven people including four foreigners - two Israelis, an Italian and a Swede - near the Egyptian Museum.
23 July 2005: Car bombs hit Red Sea resort of Sharm al-Shaikh, devastating an upmarket hotel. The government put the toll at 64, but hospitals reported 88 killed.
24 April 2006: At least 22 people are killed and 150 wounded in three blasts in the Red Sea resort of Dahab.
22 September 2008: Nineteen people, including 12 foreigners, are abducted in the country's south.
Source: Al Jazeera and agencies