The announcement comes after US Defence Secretary James Mattis said Washington will stop arming the YPG as offensive operations come to an end.
Noureddine Mahmoud, spokesman for the People's Defence Units, known as the YPG, and the backbone of the US-backed Syrian Democratic Forces, praised US and Russian air and logistical support as well as ground operations coordination.
He said his forces are ready to form joint operation rooms with the different partners to complete the fight against IS.
The press conference was attended by a Russian general from the Russian base in Hmeimeem, in western Syria.
Also Read
The SDF have been battling IS fighters east of the Euphrates river in Deir el Zour province since September. In a separate campaign, Syrian government forces, backed by Russia and allied Iranian-backed militia, have been chasing IS militants on the other side of the river.
Russia and the US kept in contact, in so-called "de- confliction" talks, to prevent clashes between the two forces. US officials said communication was also maintained on the ground, including in meetings between SDF commanders and their counterparts on the government side.
The extent of SDF cooperation with Russian forces and their Syrian allies, however, is not clear.
The Kurdish-led forces now control nearly 25 per cent of Syrian territories and important oil resources after their battlefield successes in northern and eastern Syria.
But they are landlocked and economically dependent on areas controlled by the Syrian government, as well as on borders controlled either by Iraqi forces or the Syrian government.
Meanwhile, building relationships with the tribal leaders in Deir el-Zour is an essential part of any effort to continue to hold ground. Arab tribes are skeptical of the Kurdish-led forces, although they have previously worked together, with US support.
Turkey, which considers the dominant Kurdish group in the force an extension of its own insurgent group, has protested Washington's reliance on the SDF, as well as the provision of heavy weaponry to its fighters, in the fight against IS.
On his way to Cairo, Mattis told reporters Friday that the US will stop arming the Kurdish forces, turning to stabilisation efforts and supporting the diplomatic process in Syria.
"As the coalition stops offensive operations, then, obviously, you don't need that, you need security... you need police forces. That's local forces. That's people who make certain that (IS) doesn't come back," he said.
Also today, the Russian Defence Ministry said six of its long-range Tu-22 bombers had carried out raids against IS targets in Deir el-Zour province.
A ministry statement said the bombers took off from Russia and were accompanied by fighter jets from Russia's air base in Hmeimeem.
The targets included ammunition warehouses and equipment clusters, the statement said.
Separately, Syrian activists and a war monitor said airstrikes in the rebel-held suburb of eastern Ghouta, near the capital Damascus, killed at least 18, including at least five children. The Ghouta Media Center and the Syrian Observatory for Human Rights said the airstrikes hit at least four neighbourhoods in the suburb, leaving scores injured.
Disclaimer: No Business Standard Journalist was involved in creation of this content