The operations conducted inside the towns of Cizre and Silopi in the southeastern province of Sirnak, backed by curfews, mark a new escalation in five months of fighting with the PKK since a two-and-a-half year truce collapsed.
Twenty-four PKK members have been killed in Cizre since the operations began earlier this week, while one was killed in Silopi, security sources told AFP, increasing an earlier toll.
The authorities had already announced yesterday that eight PKK fighters had been killed in Cizre.
Cizre has a population of some 100,000, and Silopi more than 80,000. Images have shown de-facto urban warfare taking place, with the army clashing with militants in the otherwise deserted streets.
The army said in a statement that six members of the security forces had received non-life threatening wounds in Cizre while two had also been hurt in Silopi.
Although analysts have called for peace talks, the authorities led by President Recep Tayyip Erdogan have said Ankara must eradicate the PKK which in recent months has again built up a significant presence in urban centres.
He said the authorities had seized 2,240 weapons, 10 tonnes of explosives and 10,000 Molotov cocktails from the militants.
Images published by Anatolia showed heavily armed soldiers backed by tanks going house-to-house in the towns and firing from street corners.
"You (the PKK) will disappear into those trenches that you dug," Erdogan told supporters in a speech in the central city of Konya broadcast on television.
"This struggle will not stop until a peaceful environment is established. There is no stopping," he added.
