The PKK has been fighting for an independent Kurdish region inside Turkey since the early 1980s.
Over 40,000 people have lost their lives since the PKK launched its armed campaign against Ankara in 1984.
The police in Turkey have clashed with thousands of pro-PKK Kurdish protesters in the southeastern province of Cizre.
The clashes erupted on Sunday after the police refused to let people hold a demonstration in support of the Kurdistan Workers’ Party (PKK), Reuters reported.
Law enforcement agents fired tear gas and used water cannon to disperse the demonstrators.
In response, the angry protesters threw stones at police vehicles and set off fireworks.
The PKK has stepped up its attacks on Turkish security forces in recent months.
On Saturday, members of the PKK attacked a border facility in Turkey’s southeastern province of Hakkari for the third time in 48 hours.
The armed men targeted the Omurlu second border battalion with heavy weapons on Saturday. A clash broke out after Turkish soldiers returned the fire.
One Turkish soldier was killed and five others wounded in the PKK attacks.