ISTANBUL - Two police officers have been killed in Turkey's predominantly Kurdish southeast during operations to push back Kurdistan Workers Party (PKK) militants, the Dogan news agency said on Friday .
The first policeman was killed in the district of Cizre late on Thursday when he and a group of colleagues came under rocket attack as they tried to break down barricades set up by PKK fighters, Dogan said .
The second was killed on Friday by a remote-controlled bomb in the district of Sur, where the local authorities have imposed a ban on demonstrations, Dogan said .
Southeastern Turkey has plunged back into some of its worst violence since the 1990s after a two-year ceasefire between the PKK and the state collapsed in July .
The PKK first took up arms in 1984 to push for greater autonomy in the southeast and some 40,000 people have since been killed in the violence. It is designated a terrorist group by Turkey, the United States and European Union .
President Tayyip Erdogan said on Thursday there would be no let-up in a military campaign which he said had killed more than 3,000 militants this year in some of the heaviest fighting since their insurgency began three decades ago.