The operation follows a string of attacks against Turkish security forces Monday, which killed six personnel.
In the southeastern province of Sirnak, four policemen were killed and another officer was wounded in a roadside bomb attack.
Another soldier was killed in an attack carried out by PKK militants on a military helicopter in Beytussebap district.
An attack on a police station in Istanbul early Monday left one police officer dead and wounded at least 11 people, including four other police officers.
Turkey, the U.S. and the EU listed the PKK as a terrorist organization.
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