Turkey's NTV news channel reported on Monday that Turkish correspondent for NBC Aziz Akyavaş went missing in Syria and the station has not been able to reach him for four days. The Turkish journalist was reporting from the region.
Along with Akyavaş, NBC is unable to reach its Middle East bureau chief Richard Engel, who was also reporting from inside Syria.
In a related story, a Turkish journalist held in Syria for three months by a group alleged to be linked to the Syrian government was released last month.
Cüneyt Ünal, who works for the US-funded al-Hurra television channel, went missing with Jordanian colleague Bashar Fahmi Kadumi shortly after crossing into Syria from Turkey on Aug. 20 to cover the civil war in the war-torn city of Aleppo.
Palestinian journalist Kadumi, who was captured at the same time as Ünal, has not yet been released.