The observatory explained that 4 of the dead were Syrians and 15 were non-Syrian nationals, including 6 Iraqi nationals, including 4 unidentified charred bodies.

According to the observatory's data, 9 attacks were aimed at points belonging to Iranian militias in the Iranian security zone, and positions of the 47th Battalion in the desert area of the city of Albukhamal near the Iraqi border.

Also, an Iranian militia convoy was attacked after it entered Syrian territory from Iraq, headquarters, a shipment of military equipment, an ammunition depot and vehicles in the city of Albukhamal and its countryside near the Syrian-Iraqi border.

The Syrian Observatory said the death toll was expected to rise as there were more than 18 militia members wounded, some seriously.

Reuters quoted Iraqi security and border guard officials as saying that unidentified aircraft bombed a number of buildings and trucks used by armed factions allied to Iran in the Syrian city of Al-Bukhamal, along the strategic border crossing with Iraq, late on Friday evening.

A local commander of the Iraqi Popular Mobilization Forces said the attacks claimed the lives of four people, without mentioning their nationality. But the commander denied that one of the fighters of the Popular Mobilization Forces deployed near the Syrian border was killed or wounded.

Sources in contact with the Syrian border officials said that the attacks targeted a convoy of eight trucks, destroying at least four of them. The officials said three buildings used by an armed Iranian militia were also attacked.

An American military official said that the US did not carry out strikes last night in Syria.