The Committee to Protect Journalists (CPJ) has urged Turkey to immediately release a Syrian journalist who, according to the group, was detained earlier this week after trying to apply for a residency permit.
The reason for the detention of journalist Rami Jarrah in the southern city of Gaziantep is not clear. CPJ said he was questioned about his journalistic activities.
Jarrah, who fled Syria in 2011, is the founder of the independent citizen journalist group ANA press that provides footage and reports to major news outlets.
"Jarrah is known for his independent reporting on the war in Syria, which he has been covering for years at great risk," CPJ's Europe and Central Asia program coordinator Nina Ognianova said.
"Syrian journalists like Jarrah, who have turned to Turkey for safe refuge, should be protected rather than subjected to detention and harassment, " she added.
Turkish authorities have not publicly commented on the case.
Turkey has come under criticism for pressuring media workers.