The incident occurred on Tuesday as a U.S. military patrol encountered a Russian military patrol in eastern Syria.
"At approximately 10 a.m. (Syria Time), Aug. 25, a routine Defeat-ISIS Coalition security patrol encountered a Russian military patrol near Dayrick, in northeast Syria," said John Ullyot, a spokesman for the National Security Council, in a statement. "During this interaction, a Russian vehicle struck a Coalition Mine-Resistant Ambush Protected All-Terrain Vehicle (M-ATV) causing injuries to the vehicle’s crew."
A U.S. official said the collision occurred after the Russian vehicle carried out what was characterized as "a reckless move."
The injuries to the U.S. service members were characterized as concussive-type injuries that were minor in nature, the U.S. official said.
"To de-escalate the situation, the Coalition patrol departed the area," said Ullyot. "Unsafe and unprofessional actions like this represent a breach of de-confliction protocols, committed to by the United States and Russia in December 2019."
"The Coalition and the United States do not seek escalation with any national military forces, but U.S. forces always retain the inherent right and obligation to defend themselves from hostile acts," the statement continued.
In addition to the actions by the Russian military vehicles, Russian military helicopters in the vicinity also hovered above the tops of the American vehicles for some time, according to the U.S. official.
Gen. Mark Milley, the chairman of the Joint Chiefs of Staff, called Gen. Valery Gerasimov, the chief of the Russian General Staff by telephone on Wednesday to discuss the incident.
"In accordance with past practice, both have agreed to keep the specific details of their conversation private," said Col. DeDe Halfhill, the spokesperson for the Joint Chiefs of Staff.
At least 500 American troops continue to operate in eastern Syria to help protect oil fields operated by Kurdish forces from ISIS. American troops come into almost daily contact with Russian military forces that operate in northern Syria, and U.S. officials say the large majority of those interactions are professional in nature.
But the U.S. official said Tuesday's incident occurred "clearly inside the eastern security zone that the Russians have agreed to stay out of."
A U.S. official confirmed that videos posted by Russian websites captured Tuesday's chaotic incident.
One video appears to show an apparent collision between an American armored vehicle and a Russian armored vehicle.
At one point, a Russian military helicopter hovered directly above a stationary American vehicle in an apparent attempt to make it move from its location