Omar Abu Layla, a Europe-based activist who heads the media outlet Deir Ezzor 24, says three drones carrying explosives hit the Conoco gas field in the eastern province of Deir ez-Zor bordering Iraq.
Rami Abdurrahman of the British-based Syrian Observatory for Human Rights, which monitors the opposition war, confirms that five explosions were heard at the Conoco gas field.
The Observatory also reported that three drones attacked the US base at Tanf in eastern Syria, near where the Syrian, Jordanian and Iraqi borders meet. It said two drones were shot down before reaching their targets, while the third hit the base, causing some property damage.
The Observatory and Abu Layla say the attack appears to be the work of Iran-based militants deployed in eastern Syria and western Iraq.
Syrian and Iraqi media reports said that a barrage of rockets hit the US base at the Conoco gas plant in the eastern governorate of Deir Ezzor. Large explosions were reported inside the base. US troops cordoned off the surrounding area after the attack.
The results of the two attacks remain unclear. US Central Command (CENTCOM) has not yet acknowledged the attacks and has not provided details.
A day earlier, two air bases hosting US troops in western and northern Iraq were attacked by suicide drones. CENTCOM admitted that one of the attacks resulted in casualties. Later, the Islamic Resistance in Iraq, a coalition of Iranian-backed armed factions, claimed responsibility, announcing the opening of an operations room to support Gaza.
The attacks on Conoco and Tanf could have been launched by the Islamic Resistance in Iraq or Iranian-backed Syrian armed factions.
The war in Gaza broke out on 7 October as a result of a surprise attack by Hamas and other Palestinian armed factions against Israel. Since then the strip has been under Israeli bombardment and reports indicate that a ground invasion is imminent.
Iraq was not the only country affected by the war in Gaza. In Lebanon, Iranian-backed Hezbollah and its Palestinian allies have been launching attacks against Israel in the Sheba'a farms for more than a week.
Israel hit Syria's two main airports in Damascus and Aleppo after the war broke out. However, there has been no response.
