Syrian security forces clashed with militants in the northern city of Aleppo on Sunday, according to residents and a pan-Arab TV station.
The clashes occurred on the road leading to the airport in Aleppo, about 355 kilometers (221 miles) northwest of the capital, Damascus, said the residents, who were reached by telephone and declined to be identified further because of security concerns.
Al-Arabiya TV also reported clashes between soldiers and militants in Aleppo, the first such fighting in the area in three months.
No official comment was immediately available and it was unclear if there were any casualties.
Also, it was not immediately known to which group the militants belonged.