Tensions have escalated in the town of Cizre since yesterday night when the Sunni Muslim Huda-Par group attacked tents belonging to rebels of the outlawed Kurdistan Workers' Party (PKK), a security source told AFP.
Huda-Par is known to be the political extension of Turkish Hezbollah and has long been hostile to the PKK -- which has fought Turkish security forces in a three-decade insurgency for Kurdish self-rule.
The clashes in Cizre were continuing sporadically, the source said.
Ankara has not intervened militarily against IS jihadists, to the fury of Turkey's Kurds, who took to streets in a show of protest in October, leaving scores of people killed in the worst outbreak of such violence in years.
The trouble has raised fears that the standoff over Kobane could derail talks between the Turkish government and the PKK for a peaceful settlement.
