Turkey's state-run Anadolu news agency said that three of its journalists were released Sunday, two days after they were kidnapped in the country's restive south.
The journalists disappeared on Friday in the town of Nusaybin, the agency said.
Anadolu reported that the banned Kurdistan Workers' Party (PKK) had carried out the kidnapping and held the men at an unknown location.
The PKK, which has been engaged in intense fighting with government forces after a two-year ceasefire broke down last year, has claimed responsibility for their capture.
The agency first reported the incident on Sunday, shortly before the reporters were released. It has not given further details.
It also said Sunday that 21 suspects have been arrested in connection with a recent deadly suicide bombing in Ankara. President Tayyip Erdogan had previously placed the number at 14.
The militant Kurdistan Freedom Falcons (TAK) claimed Wednesday's attack, which killed 29 people, including the suicide bomber. This countered previous claims from the government that Syrian Kurds from the People's Protection Units (YPG) had been behind the blast.
The YPG, which is a key ally in the United States' military offensive against Islamic State in Syria, denied any involvement.
TAK is seen as a splinter that broke away from the PKK more than a decade ago, though some security experts claim there are still links.
Ankara regards TAK as simply an extended branch of the YPG and PKK, Prime Minister Ahmet Davutoglu said on Saturday, according to a report from Anadolu.
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