A convoy of vehicles in eastern Syria was hit by drones late on Sunday night just after it entered the nation from Iraq, according to Syrian opposition activists and a pro-government radio station.
On casualties, there was no immediate information.
The attack occurred as regional rivalries between Iran and its allies became more contentious.
It was unclear right first who was responsible for the attack on the convoy in the Iranian-backed militia stronghold of Boukamal on the Syrian border.
The drones appeared to be from the U.S.-led coalition, according to the Syrian Observatory for Human Rights, an opposition war monitor headquartered in Britain, and they also attacked six refrigerated vehicles.
According to the group, ambulances flocked to the scene because there were casualties.
Another individual said the strike struck a truck convoy carrying shooters supported by Iran.
There was no early information of injuries, according to a tweet from Deir el-Zour activist Omar Abu Layla, who now lives in Europe and heads a group that keeps track of events.
According to a report from the pro-government Sham FM radio station, six refrigeration trucks were hit.
An official with a group supported by Iran confirmed a strike in Baghdad but said it only targeted one truck, and he said nothing about casualties.
Hours before the attack in eastern Syria, drones carrying bombs attacked an Iranian military factory in the country’s capital city of Isfahan, causing some damage to the facility.
Israel’s military chief of staff implied last month that Israel was responsible for an attack on a truck convoy in Syria.
Lt. Gen. Aviv Kochavi, who concluded his military career earlier this month, said Israeli military and intelligence capabilities made it possible to hit particular targets that pose a threat.
Israeli officials have already admitted to attacking many targets in Syria and abroad as part of a mission to impede Iranian attempts to transfer weapons to proxies like the militant Hezbollah group in Lebanon or to destroy weapons depots.
The Observatory noted that the November attack in Syria’s eastern province of Deir el-Zour hit fuel tanker trucks and other trucks transporting weaponry for the militias. According to the report, the strike claimed at least 14 lives, most of the militiamen.
At the time, supporters of the Syrian opposition claimed that the strike along the Iraqi border had targeted militias supported by Iran.
According to two paramilitary officers in Iraq, Iranian nationals were slain in the incident.
Israel declined to remark on the strike at the time.
Iran has been a significant supporter of Syrian President Bashar Assad throughout the country’s 11-year civil conflict, sending thousands of men to assist Syrian forces.
Hezbollah, which has fought alongside Assad’s forces in the battle, is linked with Iran and Assad’s government.
Israel has issued warnings against what it sees as Iran’s hostile operations in the region because Iran is considered to be its main enemy.