Four Iranian militiamen were killed in a drone strike, the second of a kind in days, targeting Syria’s Al Bukamal district in the eastern countryside of Deir Ezzor province, reported a UK-based war monitor on Tuesday.

According to the Syrian Observatory for Human Rights, the unidentified drone attack targeted several positions held by Iran-allied militias in Al Bukamal, which lies near Syrian-Iraqi borders.

In other news, the Syrian Information Ministry reported that an explosion went off at a gas lab near the al-Shaddadi city in the countryside of the northeastern province of al-Hasakah.

The ministry said the lab was attacked in an area run by the Washington-backed Kurdish Syrian Democratic Forces (SDF). It did not reveal further details.

The North Press news agency, which is based in al-Hasakah, denied that an attack took place.

Instead, it quoted exclusive sources from the gas lab saying the explosion happened after a fire broke out when an oil truck was unloading at the site.

More so, the sources revealed that the blast had slightly injured a few workers at the plant and caused damage in the area.

On Friday, Israeli airstrikes targeted a military airfield in the eastern countryside of Homs in central Syria, wounding six soldiers, the official Syrian Arab News Agency (SANA) reported.

Citing a military statement, the report said the Israelis launched their attack from the direction of the al-Tanf area in southern Syria, targeting the T-4 airbase in the countryside of Homs.

It said the air defenses intercepted most missiles.

Meanwhile, the Observatory said explosions rocked the T-4 airbase, where a training center for drones that belong to pro-Iran militias is located.

The watchdog said the attack was carried out by Israeli warplanes, which flew over the al-Tanf area and fired against the airbase in Homs.