TEHRAN, Young Journalists Club (YJC) - Turkey launched "Operation Olive Branch" over the weekend, pushing into the Afrin region to dislodge the U.S.-backed Syrian Kurdish YPG and opening a new front in the seven-year-old Syrian civil war.
Turkey considers the YPG a terrorist organization and an extension of the outlawed Kurdistan Workers Party (PKK), which has waged a three-decades-old insurgency in Turkey's largely Kurdish southeast.
President Tayyip Erdogan has overseen a sweeping crackdown since a failed coup in 2016 that critics say has unjustly targeted pro-Kurdish politicians.
Leaders of Turkey's largest pro-Kurdish party, the Peoples' Democratic Party (HDP), are in jail on terrorism charges, which they deny.
The interior ministry did not give details on the 27 arrests. Separately, state-run Anadolu news agency earlier said prosecutors in the southeastern city of Diyarbakir had issued arrest warrants for 17 people who shared material "to provoke citizens of Kurdish origin and encourage them to go into the streets".
Police seized a pump-action rifle, a pistol and ammunition in related raids in Diyarbakir, Anadolu said.
The moves come after Turkish police used pepper gas to disperse pro-Kurdish protesters in Ankara and Istanbul on Sunday, detaining at least 12 people.