Turkish and Russian troops completed their fourth joint ground patrols in northern Syria as part of an agreed-upon deal, according to Turkey’s National Defense Ministry on Monday.

The patrols were carried out in Darbasiyah town, east of the Euphrates River.

“Turkish and Russian military units have completed their fourth joint land patrol as planned, accompanied with UAVs [Unmanned Aerial Vehicle] and four vehicles each, in the Darbasiyah region in the east of the Euphrates,” the ministry said in a Twitter post.

Read more: Turkey, Russia complete 4th joint patrols in N. Syria