Turkey has been hit by a series of attacks in the past two years, mainly in Istanbul and also in tourist resorts on the Mediterranean. There have not always been claims of responsibility, although Kurdish rebels, Islamist militants and leftist extremists have all carried out attacks in the past.
Here is a summary of some of the recent major attacks.
27 JULY 2008
At least 17 people are killed and many wounded in two explosions in the Gungoren shopping district of Istanbul, which the city's governor describes as "terror attacks".
9 JULY 2008
Three police officers and three gunmen are killed in an attack on the entrance of the US consulate in Istanbul.
The US ambassador to Turkey condemns it as "an obvious act of terrorism" aimed at his country.
3 JANUARY 2008
Six people are killed and more than 60 wounded in a car bomb attack targeting a military bus in the south-eastern city of Diyarbakir.
22 MAY 2007
Six people are killed and more than 90 injured in a suicide bombing at the entrance to a shopping centre in the capital, Ankara.
The city's governor says the method and type of explosives used suggest the bomber was a member of a Kurdish rebel group.
5 NOVEMBER 2006
Three soldiers are killed and 14 others wounded when roadside mines explode beside a military convoy in south-eastern Turkey.
An official statement accuses Kurdish rebels.
2 OCTOBER 2006
Fifteen people are injured in a blast at a cafe in Izmir, Turkey's third largest city.
The attack comes a day after the rebel Kurdistan Workers Party (PKK) declares a unilateral ceasefire.
12 SEPTEMBER 2006
Eleven people are killed, eight of them children, in a bomb blast in a park in Diyarbakir, a city in the country's mainly Kurdish south-east.
28 AUGUST 2006
Three people are killed and at least 20 hurt in an explosion in the resort of Antalya.
Later, 21 others are injured in three explosions in the southern holiday resort of Marmaris.
Another six people are injured in an explosion near the local government's office in the Istanbul district of Bagcilar. Police say they suspect the involvement of Kurdish militants.
4 AUGUST 2006
Thirteen people are injured in two bomb attacks in southern Turkey.
The first bomb explodes near a bank in the city of Adana. The second blast occurs minutes later at a nearby construction site.
25 JUNE 2006
Four people are killed and 25 injured in an explosion near a restaurant in the resort region of Antalya.
Initial investigations suggest a gas canister exploded, but it is not known if this was an accident.
15 JUNE 2006
An explosion near a bus station in central Istanbul injures three people.
Officials say an explosive device was hidden in a rubbish bin in the busy Eminonu district.
3 JUNE 2006
Fourteen people are injured in an explosion outside a shopping centre in the Mediterranean port city of Mersin.
The blast is said to have been caused by a remote-controlled bomb set off outside a shop.
16 APRIL 2006
Thirty-one people are hurt in an explosion in the Bakirkoy district of Istanbul.
The blast appears to have been caused by a bomb left in a rubbish bin near a shop.
5 APRIL 2006
Two people are injured when an explosion tears through the local offices of the ruling Justice and Development Party (AKP) in Istanbul.
31 MARCH 2006
One person dies and 13 others are injured when a bomb explodes inside a rubbish bin near a bus stop in the Kocamustafapasa district of Istanbul.
15 MARCH 2006
Two people are injured in an explosion outside an HSBC bank branch in southern Turkey. The attack takes place in Diyarbakir, a mainly Kurdish city close to the Syrian border.
13 FEBRUARY 2006
Eleven people are hurt in an explosion in front of a supermarket in the Bahcelievler suburb of Istanbul.
A Kurdish militant group claims responsibility for planting the device.