At least nine pro-regime fighters died in a suspected Israeli missile strike overnight in the northern Syrian province of Aleppo, the Syrian Observatory for Human Rights said Monday.
"The Israeli missiles targeted an Iranian Revolutionary Guard (IRGC) center, near the Neirab military airport," said Observatory head Rami Abdel Rahman.
He said those killed included at least six Syrians, but could not specify the nationalities of the remaining fighters.
The position is a logistics hub used to provide equipment and food to pro-regime forces fighting at nearby fronts, but it did not store weapons, Abdel Rahman said.
Late Sunday, state news agency SANA said Israeli missiles had hit near a strategic air base, but said there were no casualties.
It said the strikes were an attempt by Israel to support rebels in southern Syria, where regime forces have been waging an offensive.
An Israeli military spokesman declined to comment on the report.
The attack is the third suspected Israeli strike on Syria this month alone.