"International coalition forces are bombing popular forces fighting "Daesh" and the (Syrian Democratic Forces) east of the Euphrates river and there are reports of casualties", statements carried by the stations said.
The official said about 100 pro-government forces were killed in the counterattack.
USA officials say no Americans were injured or killed in the attack by the pro-regime forces.
A rare United States airstrike in Syria has killed approximately 100 pro-government troops. USA troops were there at the time, but none of them were hurt.
The officials decline to identify details of the attacking forces, which are suspected to be Syrian or from one of a number of allied militia units, including from Iraq and Lebanon, that are backing President Bashar Al Assad in the country's seven-year civil war.
Neither was it clear whether Russian Federation, which is conducting its own air campaign in support of the Syrian government, may have had any role in the incident.
Snow totals hold true to Storm Team 27 forecast
A winter storm warning remains in effect until Thursday morning, with 8 to 12 inches expected in the Glens Falls region. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
Zidane Admits Real Madrid Draw With Levante Was Tough To Take
But the Spanish center-back may consider it some consolation that he is among the most prolific defenders to have played the game. Real Madrid Likely XI: Navas, Carvajal, Varane, Nacho, Marcelo, Casemiro, Kroos, Modric, Bale, Ronaldo, Benzema.
Former F1 model calls decision to ban grid girls
Jacob Rees-Mogg has said he is glad practices such as using so called " grid girls " are fading out after a ban by Formula One . The notable thing 68-year-old Lauda and octogenarian Ecclestone do have in common is their accumulation of birthday candles.