An air strike has killed four Syrian military personnel in Deir Ez Zor province, news reports said on Monday.

The UK-based Syrian Observatory for Human Rights said the strike hit part of the Saeqa military camp near the town of Ayyash in Deir Ez Zor province. 

The monitoring group said the air raid also wounded 13 Syrian military personnel.

A source close to the Syrian government confirmed the strike to the Reuters news agency and said there had been casualties and vehicles destroyed.

The air strike hit some time in the last 24 hours, the monitoring group said.

It was not immediately clear which air force was responsible. The area is largely under the control of the Islamic State of Iraq and the Levant (ISIL).

A US-led coalition has regularly targeted the group in the eastern Syrian province.

Russia also began launching air strikes in Syria in late September. 

When asked about the reports, the US military told Al Jazeera it conducted four strikes in Deir Ez Zor on Sunday - "all against oil well heads" - and 55km away from the town of Ayyash.

"We did not strike any vehicles or personnel targets in this area. We have no indication any Syrian soldiers were even near our strikes," the US military said in a statement. "We take all allegations of potential collateral damage seriously and will look into every allegation we receive."

The observatory said the Syrian military camp was hit about 2km from an area controlled by ISIL.

In Deir Ez Zor city, another air strike overnight on Sunday killed a woman and two of her children, said the observatory, which relies on a network of activists, medical staff, and fighters on the ground for information.

On Sunday, at least 32 ISIL fighters were killed in apparent US-led coalition raids, as Syria's President Bashar al-Assad slammed Britain's decision to join the fight.

The observatory said the ISIL members were killed in about 15 strikes on the group's stronghold of Raqqa province in northern Syria.

The monitoring group's Rami Abdel Rahman said the strikes hit an ISIL headquarters and bases to the north, east, and southeast of Raqqa city, its de facto capital.

Syria's conflict has taken the lives of more than 250,000 people, and another four million have been forced to flee the country since it erupted in March 2011.

Courtesy Aljazeera