The incident took place after a series of clashes between pro-regime troops and the US-backed anti-ISIS group, the Syrian Democratic Forces, near the SDF-held town of Ja'Din, just south of Tabqah, Syria.
Two weeks ago, a U.S F-15 destroyed a pro-regime drone after it dropped what turned out to be a dud bomb near U.S-backed local forces. On Sunday, a U.S. F/A-18 Super Hornet shot down a Syrian Su-22 attack jet after it fired on US allies near the city of Tabqa, which is well to the north of Tanf.
The incident closely followed Sunday's USA downing of a piloted Syrian army jet in the southern Raqqa countryside after it dropped bombs near US -backed forces.
Assad and his allied forces opposing ISIS are now colliding with the US -backed Syrian Democratic Forces opposing ISIS, which consist of Arab rebels and the Syrian Kurds of the PYD.
Russian defense ministry said it will suspend an agreement between the us and Russia that worked to limit the risk of in-flight incidents between the two countries, The Washington Post reported. "The Americans are fully aware of our position and we say that such actions are absolutely unacceptable".
Last week, Iraqi Popular Mobilization Forces who fought their way to the Syrian border expressed their hope to deliver supplies to Syrian government forces in the besieged city of Deir-al-Zor, where Islamic State group holdouts are clinging to one of their last strongholds.
Tensions escalated on Sunday as the US Army brought down the jet near Raqqa and Iran launched missiles at IS targets in eastern Syria - the first time each state has carried out such actions in the multi-sided Syrian war.
The official said the United States pilot saw the Syrian pilot eject and saw a parachute deploy, but the U.S. believes the pilot would have landed in ISIS-controlled territory in Syria.
Suspension is "precautionary measure" amid rising tensions between Russian Federation and USA over downing of a Syrian jet.
US officials said it remained uncertain as to who was operating the drones - Whether it was Shiite militia fighters, Syrian officers or Iranian advisers.
The Sunday downing of the Syrian warplane prompted Russian Federation to issue a threat against American airborne assets over Syrian airspace and track all coalition flights west of the Euphrates River.
USA intelligence analysts quickly concluded that Iran fired the missiles mostly in retaliation for a pair of Islamic State attacks earlier this month on Iran's parliament building and the tomb of the Islamic Republic's founder.
It described Binali as "a close confidant" of IS leader Abu Bakr al-Baghdadi, and said he "had a central role in recruiting foreign terrorist fighters and provoking terrorist attacks around the world".
The push by Syrian government forces in the Daraa area looks to be heading to the Jordanian border.