At least 30 people are now known to have died in clashes between Turkish security forces and separatist Kurdish rebels last night.
Ten Turkish soldiers and 20 militants lost their lives in the fighting.
Army officials said some 100 guerillas loyal to the Kurdistan Workers Party, or PKK, attacked a number of military outposts in Beytussebap.
The small mountainous town lies inside Turkey’s Sirnak province close to the border with Syria and Iraq.
Ankara believes Syria is supporting the PKK, which has intensfied its attacks on Turkey since the uprising against Syrian President Bashar Assad’s rule began.
The PKK, listed as a terrorist organisation by the EU and the US, took up arms 28 years ago.
Its aim is to carve out a Kurdish state in Turkey’s southeast. The conflict has claimed at least 40,000 lives.