The Syrian Observatory for Human Rights (SOHR) asserted on Monday that a US-led coalition's air strike killed at least three Assad regime soldiers in the Deir al Zor province in eastern Syria which is largely under the control of the DAESH terror organisation.
The SOHR claimed the coalition air strike hit part of the Saeqa Army camp in Deir al Zor and also injured 14 military personnel.
The Syrian regime also confirmed that the incident occurred and added army vehicles had been destroyed.
However, US President Barack Obama's special presidential envoy for the Global Coalition to Counter DAESH, Brett McGurk denied the incident on Monday on his twitter account, saying there had been "No coalition strikes within 55km of claimed incident on Syrian base in Deir al Zor."
— Brett McGurk (@brett_mcgurk) December 7, 2015
The Observatory also claimed that during the coalition air strikes one woman and two of her children were killed in the same city.
A US military official said that there are indications that an air strike was carried out by a Russian TU-22 bomber in the area. Russia, the main ally of the Assad regime, launched a campaign of air strikes in support of Assad on September 30.
Deir al Zor has played key role in the Syrian conflict due to its oil reserves. According to a Turkish security official who spoke to Anadolu Agency on condition of anonymity, energy links have been established between embattled regime leader Bashar al Assad and DAESH in Deir al Zor.
Last month, US-led coalition air strikes destroyed DAESH oil pipelines, electricity facilities and data transmission systems, creating a power deficiency in the region, the source said.
The official also added that the Assad regime sent a group of its engineers to the Deir al Zor and Mariye regions to overcome the problem.
Turkish Prime Minister Recep Tayyip Erdogan, some EU officials and the US say that the Assad regime is buying oil from the DAESH terror group.
For this reason, the EU and US have started to impose sanctions on individuals and companies linked to the oil trade between Assad and DAESH.
The four-year-long war in Syria has so far claimed the lives of at least 350,000 people, while displacing half of the country's pre-war population of 22 million internally and in the neighbouring countries of Turkey, Lebanon, Egypt, Iraq and Jordan. At least 350,000 refugees have also sought asylum in European countries.
According to Syrian Network for Human Rights (SNHR) sources, between March 2011 and October 31, 2015, more than 188,000 civilians were killed including nearly 40.000 women and children, large numbers of whom lost their lives during air strikes and barrel bombings in civilian areas by the Syrian regime.