Syria’s official news agency has reported the death of four US soldiers in an explosion in Hasaka countryside.

The American soldiers were killed after their vehicle was targeted with an explosive device near the village of Markadeh on Hasakah-Dayr al-Zawr road, SANA reported Sunday.

The incident happened while the troops were travelling between the US-occupied Al-Shaddadi and Al-Omar bases, according to ASB News.

Following the explosion, the US forces cordoned off the area amid the flight of American warplanes in the area, SANA reported.

The report also said a translator was among the victims, who were taken to the al-Shaddadi base in Hasakah countryside.

Other reports claimed the bomb attack was allegedly carried out by Daesh.

A US-led military coalition has been bombarding what it claimed Daesh positions inside Syria since September 2014 without any authorization from the Damascus government or a UN mandate.

A large number of American troops are also operating on the ground in eastern and northeastern Syria. While the US claims its troops in Syria are assisting the allied SDF Kurdish militants in their purported fight against Daesh, there is ample evidence which shows the US is there to loot Syria’s oil resources.

Last month, it was revealed that the US military has used dozens of tanker trucks to smuggle crude oil from Syria’s northeastern province of Hasakah to western Iraq.

Syria’s official news agency SANA, citing local sources, reported that a convoy of 37 tankers left Syria through al-Walid border crossing near al-Ya'rubiyah town in late October, and headed towards Iraqi territories.

The sources added that several armored vehicles belonging to the US military and militants affiliated with the so-called Syrian Democratic Forces (SDF) escorted the convoy until it arrived at the border crossing.

The looting of Syrian oil by the US was fist confirmed during a Senate hearing exchange between South Carolina Republican Senator Lindsey Graham and US Secretary of State Mike Pompeo in late July.

The US president has more than once acknowledged that American military forces are in Syria for the country's oil.

In another explosion, three members of the “engineering teems” affiliated to “Al-Bab police” in the north-eastern countryside of Aleppo have been killed in the explosion of an IED, Syrian Observatory for Human Rights reported.

The incident took place Al-Bab city which is under the control of the factions of the so-called “Euphrates Shield” operations room.