Here is a recap of key events since a suicide attack killed 32 people in Turkey last week.

- July 20: A bombing in the mainly Kurdish town of Suruc near the border with Syria kills 32 people and wounds 100 others. Prime Minister Ahmet Davutoglu says it appears to be the work of the IS group.

- Protests erupt in major Turkish cities against Ankara's alleged complicity with IS.

- July 22: The Kurdistan Workers' Party (PKK) claims the killing of two Turkish policemen in the border town of Ceylanpinar to avenge the Suruc attack.

- July 23: Jihadists inside Syria open fire on a Turkish army border post in the Kilis region, killing one officer and wounding two soldiers.

- In Diyarbakir, a majority Kurdish city in southeastern Turkey, gunmen kill a Turkish policeman and seriously wound another.

- July 24: Turkish fighter jets hit IS targets inside Syria for the first time, killing nine militants. Later air strikes target PKK militants in northern Iraq.

- IS members, Kurdish militants and Marxists are arrested in dawn raids in Istanbul and other cities. The number held climbs to more than 1,300 by July 29.

- President Recep Tayyip Erdogan says Turkey will let Washington use the strategic Incirlik airbase for strikes against IS.

- July 25: Turkish air strikes intensify against IS jihadists in Syria and PKK militants in Iraq.

- The PKK's military wing says conditions for maintaining the ceasefire with Turkey "have been eliminated".

- A car bombing kills two Turkish soldiers in the Kurdish-dominated southeast.

- July 26: Ankara launches new air raids on Kurdish command posts in northern Iraq.

- Turkish protesters battle security forces in Istanbul, a policeman is shot and killed.

- July 27: Turkey and the US agree to create an "IS-free zone" in northern Syria, which Erdogan says will help 1.7 million refugees return home.

- Gunmen in a predominantly Kurdish town kill a Turkish paramilitary police commander.

- July 28: Erdogan says "it is not possible" to pursue the peace process with the PKK.

- At an emergency meeting held at Turkey's request, NATO expresses "strong solidarity" with Ankara, but Germany voices concerns over the action against the PKK.

- Turkish jets hit PKK positions in the southeastern Turkish province of Sirnak, allegedly after militants opened fire on security forces.

- July 29: Turkey pursues air strikes against the PKK in Turkey and northern Iraq, targeting shelters, depots, logistical bases and caves used by the group.

- The Turkish parliament holds an emergency session to debate the government's controversial two-pronged offensive.