Hurriyet Daily News reports:

Turkey isn’t ruling out international intervention in Syria if the Bashar al-Assad regime doesn’t stop using violence against its own people, a Turkish official speaking on condition of anonymity told the Hürriyet Daily News on Friday.

The source also said that a letter from Turkish President Abdullah Gül to Assad delivered by Turkish Foreign Minister Ahmet Davutoğlu on Tuesday was considered by Ankara as an “ultimatum” to Damascus that, if violence by Syrian troops continued, Assad would no longer be able to rely on Turkey’s friendship.

“Up until eight months ago, we were trying to convince our Western allies to give some more time for Assad to implement reforms. We were as friendly as to convene joint Cabinet meetings and lift visas,” the source told the Daily News. “But if a regime is not listening to the advice of its friend and neighbor and continues opening fire on its own people, that regime can no longer be Turkey’s friend.”