Turkish-Russian militaries conduct joint patrol in northwestern Syria
Turkish and Russian military vehicles return following a joint patrol in northeast Syria, as they are pictured near the Turkish border town of Kızıltepe in Mardin province, Turkey, Nov. 1, 2019. (Reuters File Photo)


Turkish and Russian military elements performed the 13th joint patrol along a key highway in Idlib, northwestern Syria, the Turkish National Defense Ministry said on Thursday.

"Within the framework of TUR-RF Agreement/Protocol, the 13th TUR-RF Combined Land Patrol on M-4 Highway in Idlib was conducted with the participation of land and air elements," the ministry said in a tweet.

The M4 highway, also known as the Aleppo-Al Hasakah road, is about 30 kilometers (19 miles) from Turkey's southern border.

The twelfth joint patrol was carried out on May 20.

This March, Ankara and Moscow agreed on a protocol urging parties to "cease all military actions along the line of contact in the Idlib de-escalation area."

The protocol said joint Turkish-Russian patrols would begin on March 15 along the M4 highway from the settlement of Trumba -- 2 km (1.2 miles) to the west of Saraqeb -- to the settlement of Ain al-Havr.

Idlib has long been under siege by Assad regime forces and its allies, and previous cease-fires for the region were plagued by violations.

Turkey has worked to protect the local civilian population as well as rid the wider region of terrorist elements.