It is not clear at this point whether the incident occurred due to an external intervention or not. An investigation has been launched, he told journalists in southwestern Mugla province, local TV channel CNN Turk reported.
The Turkish helicopter was a T129 ATAK helicopter, confirmed Yildirim.
"We are looking into it. We are trying the determine the cause," he noted.
In a statement, Turkish General Staff said an ATAK combat helicopter crashed around local time 1 p.m. during ongoing operation in Afrin. Technical investigation is underway.
Speaking at a meeting of the ruling Justice and Development Party (AKP) in Istanbul, Erdogan said "we might lose one helicopter, but they will pay a heavier price."
Turkey launched "Operation Olive Branch" on January 20 to clear People's Protection Units (YPG) militants, backed by the United States while considered by Ankara as "terrorist group," from Afrin in northwestern Syria.
With the helicopter crash, the death toll of the Turkish Armed Forces increased to 20. More than 1,100 YPG militants have been killed, according to Turkish military.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)