One soldier and three Kurdish guerrillas have been killed in clashes..

Operations continued in the region, another official said.
The PKK largely withdrew to northern Iraq after their commander Abdullah Ocalan was captured in 1999. Turkish authorities have warned that several hundred militants have returned to southeastern Turkey since the Iraq war.
The PKK, also known as KADEK, has fought for an ethnic homeland in southeastern Turkey since 1984. More than 30,000 people, mainly Kurds, have been killed.