13 May. SANA reports new US-allied forces reinforcements heading towards oil/gas locations in Hasaka province (as described by the source).
4 May. Russian sources report significant tensions with US troops near Kamyshly, after Russian military police blocked US patrol on May 2 (1, 2). It is said that thereafter Americans established several positions outside of their agreed zone of responsibility and without notifying Russian troops, and tried to prevent Russians patrolling on May 4. Report goes on to say that "due to high professionalism of Russian forces a serious incident was avoided"