In Turkey, security sources say Kurdish guerrillas from the PKK separatist group have attacked military posts in the Cukurca district in the south east of the country.
Latest figures indicate 26 soldiers have been killed and 22 injured.
It is claimed Turkish commandos crossed the border with Iraq in pursuit of the guerrillas.
The killings come after a roadside bomb planted by suspected Kurdish rebels exploded on Tuesday killing five policemen and four civilians including a two-year-old-girl.
The two incidents follow just days after Turkish President Abdullah Gul visited troops to boost morale in an area which has seen increased violence in recent months.
Kurdish separatists seeking greater autonomy for the south east of the country are accused of having killed more than 50 security personnel since July. Since 1984, the conflict between the separatists and the Turkish government has claimed tens of thousands of lives.
Prime Minister Tayyip Erdogan has cancelled a planned visit to Kazakhstan in light of the most recent attack.