Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. US Forces Block Another Russian Convoy as Tensions Rise in Northeast Syria Zana Omar HASAKAH, SYRIA / WASHINGTON - U.S. forces in northeast Syria againprevented Russian military convoys from touring near the Iraqi border on Friday, in what locals describedas an increased escalation between both sides over freedom of navigation in the predominantly Kurdish region. A VOA reportersawAmerican Humveespatrollingthe main road of al-Malikiyah town, also known as Derik, in northeast Hasakah province, in what local sources said wasan effortto prevent an approaching Russian convoy from passingbythe region. The sources said the disputewas over the control of M4 highway, al-Malikiyah and Tall Tamr areas that became a dividing line between the two sides following the October 2019 Turkish incursion that forced the U.S. to pull out from much oftheTurkey-northeast Syria borderregion. "I see [U.S. and Russian forces] a lot on these roads. They have their own disputes. They block roads here and there. For example, inXanaSere village and in Derik," a resident of al-Malikiyah, whofor security reasonsdid not want to be named,told VOA. Earlier encounter Thiswas not the first time U.S. forces hadencountered Russian patrols in the area. Nishan Mohammad, a local reporter, last week told VOA hesawat least three similar standoffsin which U.S. soldiers stopped Russian military vehicles and forced them to head back to their bases. Contacted by VOA, Syrian Democratic Forcesofficials declined to comment on the matter, citing the sensitivity of the issue. The U.K.-based Syrian Observatory for Human Rights reported Wednesday that U.S. troopshadblocked a Russian convoy from al-Kharita village in Hasakah road heading toward JabalQazuzana. The observatory reported that on the same day,a group of Russian forces from Tall Tamr was heading to Hasakah, only to be barred from further advancing by U.S. troops near a U.S. base intheal-Wazirarea. SDF intervenes "Verbal altercations took place between both forces and evolved into raising weapons, but the SyrianDemocratic Forces intervened as a mediator between them," the watchdog group said, adding that Russian forces have deployed advanced air defense missile systems at al-Qamishli Airbase in the far northeast as both sides try to extend control over the area. U.S. forces were in control of most of northeast Syria until October, whentheTurkish military and its allied Syrian militants launched a campaign againsttheU.S.-backed SDF. Since then, Russian forces and the Syrian government have entered the border region between Turkey and northeast Syria with the aim of filling the area evacuated by the U.S. There are still about 500 troops in the area who, according to U.S.officials, are protecting the region's oil fields and preventing Islamic State from reemerging. VOA'sSirwanKajjo contributed to this story from Washington. .