Activists gather in the historical Sur district to promote an International Women's Day rally to be held March 8, in the Kurdish-dominated southeastern city of Diyarbakir, Turkey March 1, 2017. REUTERS/Sertac Kayar - RTS10YEW

Activists gather in the historical Sur district to promote an International Women's Day rally to be held March 8, in the Kurdish-dominated southeastern city of Diyarbakir, Turkey March 1, 2017. REUTERS/Sertac Kayar - RTS10YEZ

A wall along the border between Turkey and Syria is seen near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114B3

A Turkish soldier patrols along a wall on the border line between Turkey and Syria near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114N5

A Turkish K9 unit patrol along a wall on the border line between Turkey and Syria near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114UG

A Turkish soldier on an armoured military vehicle surveys the border line between Turkey and Syria, near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS115OV

Actor Reha Beyoglu, who portrays Turkish President Tayyip Erdogan in a biopic titled "Reis", or "Chief", poses for photographers during a gala screening of the movie in Istanbul, Turkey, February 26, 2017. Picture taken February 26, 2017. REUTERS/Murad Sezer - RTS115XN

A supporter of pro-Kurdish opposition Peoples' Democratic Party (HDP) holds a "No" placard in Kurdish during a campaign meeting for the April 16 constitutional referendum, in Diyarbakir, Turkey, March 2, 2017. REUTERS/Sertac Kayar - RTS116RF

Activists gather in the historical Sur district to promote an International Women's Day rally to be held March 8, in the Kurdish-dominated southeastern city of Diyarbakir, Turkey March 1, 2017. REUTERS/Sertac Kayar - RTS10YEX

An activist walks in the historical Sur district to promote an International Women's Day rally to be held March 8, in the Kurdish-dominated southeastern city of Diyarbakir, Turkey March 1, 2017. REUTERS/Sertac Kayar TPX IMAGES OF THE DAY - RTS10YF4

An activist walks in the historical Sur district to promote an International Women's Day rally to be held March 8, in the Kurdish-dominated southeastern city of Diyarbakir, Turkey March 1, 2017. REUTERS/Sertac Kayar - RTS10YCR

An activist walks in the historical Sur district to promote an International Women's Day rally to be held March 8, in the Kurdish-dominated southeastern city of Diyarbakir, Turkey March 1, 2017. REUTERS/Sertac Kayar - RTS10YF9

A wall along the border between Turkey and Syria is seen near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114BO

An armoured military vehicle drives past a wall along the border between Turkey and Syria, near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114BR

A wall along the border between Turkey and Syria is seen near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114BT

Turkish soldiers stand at attention at Hoyuk military post on the border between Turkey and Syria near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114DJ

Cameras installed on armoured military vehicles monitor Syrian side of the border, near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114SP

A camera installed on an armoured military vehicle monitors Syrian side of the border, near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114T7

A Turkish soldier patrols along a wall on the border line between Turkey and Syria near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS114TG

A Turkish soldier participates in an exercise on the border line between Turkey and Syria near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS115HZ

A Turkish soldier on an armoured military vehicle surveys the border line between Turkey and Syria, near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS115IB

Turkish soldiers participate in an exercise on the border line between Turkey and Syria near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS115HV

Turkish soldiers on an armoured military vehicle survey the border line between Turkey and Syria, near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer - RTS115P1

Actor Reha Beyoglu, who portrays Turkish President Tayyip Erdogan in a biopic titled "Reis", or "Chief", talks to media during a gala screening of the movie in Istanbul, Turkey, February 26, 2017. Picture taken February 26, 2017. REUTERS/Murad Sezer - RTS115XO

Actor Reha Beyoglu, who portrays Turkish President Tayyip Erdogan in a biopic titled "Reis", or "Chief", poses for photographers during a gala screening of the movie in Istanbul, Turkey, February 26, 2017. Picture taken February 26, 2017. REUTERS/Murad Sezer - RTS115XP

Actor Reha Beyoglu, who portrays Turkish President Tayyip Erdogan in a biopic titled "Reis", or "Chief", poses for photographers during a gala screening of the movie in Istanbul, Turkey, February 26, 2017. Picture taken February 26, 2017. REUTERS/Murad Sezer - RTS115XR

Supporters of pro-Kurdish opposition Peoples' Democratic Party (HDP) hold "No" placards in Turkish and Kurdish during a campaign meeting for the April 16 constitutional referendum, in Diyarbakir, Turkey, March 2, 2017. REUTERS/Sertac Kayar - RTS116QZ