A shipment of arms and ammunition loaded on vegetable trucks entered Syrian territory from Iraq, according to the Syrian Observatory for Human Rights.
The Observatory said that the shipment was smuggled out "fear of being targeted” by the United States or Israel.
It entered from the Syria through an unofficial border crossing.
The weapons, which included short-range rockets and their launchers, were moved to the town of al-Mayadin in the southern countryside of Deir Ezzor. They were allegedly stored in tunnels dug beneath the town’s historic citadel.
Meanwhile, the Ain al-Furat Network said that the Iranian Revolutionary Guard Corps (IRGC) has shut its shared radio frequencies with the Syrian regime forces in the areas of the eastern countryside of Homs.
The forces only kept a single frequency for emergency purposes.
The network’s correspondent quoted a private military source as saying that the decision came at the request of the IRGC leadership at the T-4 military airport, east of Homs, without providing any further explanation.
The military source said there were seven open frequencies between the Syrian regime forces and the IRGC, including five for military purposes, one logistical, and one medical.
The Russian forces communicate with the Revolutionary Guards through the joint emergency frequency with the Syrian regime.
The relationship between the regime and the Iranian militias is witnessing tensions. Activists said "Hajj Askar," the official in charge of the pro-Iranian militias in al-Bukamal, east of Deir Ezzor, has refused to open halls for the regime forces so they can carry out the settlement agreements set to take effect on Monday.
Instead, the regime set up tents at the entrance of Deir Ezzor to handle the settlement, according to the Observatory.
Last month, over 1,000 people agreed to the settlement in the Reconciliation Center in al-Mayadin.
According to human rights sources, 1,050 persons, most of whom are former members of the opposition factions and defectors from the regime forces, arms dealers, and wanted persons on terrorism charges from different areas of the Deir Ezzor countryside, agreed to the settlement in the center inaugurated by the Syrian intelligence last month.