A new party of US arms and armored vehicles arrived in Syria on Wednesday, the SDF spokesman said.
"The US sent us armored Hummer vehicles and heavy weapons as part of the operation to liberate Deir ez-Zor. The arms consist of missiles, heat-guided missiles, heavy machine guns, automatic machine guns, mortars and Kalashnikov assault rifles," the spokesman said.
The SDF representative noted that the SDF forces expect more weapon deliveries from the US in the near future.
"We told US representatives that we need more weapons to carry out the operation. They, in turn, promised that in the near future they will provide us with more heavy weapons supplies," he said.
According to the information, the US supplied the armed forces with 1,470 heavy weapons and armored vehicles so far.
Deir ez-Zor, located 140 km south east of Daesh's self-proclaimed capital city of Raqqa, has been under siege for over three years. On September 5, the Syrian troops managed to unblock the city.
On Friday, the Syrian military started an operation to break the siege of the Deir ez-Zor airbase, having captured a strategic hill in the vicinity of the facility. It was reported that the troops broke into the area near the airbase from the direction of the city's graveyard.
Simultaneously, the SDF have been carrying out an Operation Euphrates Rage to retake Raqqa from Daesh with the support of the US-led international coalition since November 2016. The province of Raqqa is located west of Deir Ez-Zor.