Turkish and Russian military elements have carried out their 14th joint patrol along a key highway in Idlib, northwestern Syria, near the Turkish border, Turkey’s National Defense Ministry said on Tuesday, according to Anadolu Agency.

“Within the framework of TUR-RF Agreement/Protocol, the 14th 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 thirteenth joint patrol was carried out last Thursday.

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.”