Updated 6.07pm with sanctions announcement -

President Donald Trump announced on Wednesday the United States would be lifting sanctions on Turkey, hailing the success of a ceasefire along its border with Syria.

"Earlier this morning, the government of Turkey informed my administration that they would be stopping combat and their offensive in Syria and making the ceasefire permanent," he said in a televised address from the White House.

"I have, therefore, instructed the Secretary of the Treasury to lift all sanctions imposed October 14th in response to Turkey's original offensive moves against the Kurds in Syria's northeast border region," he added.

Trump has been under fire for abruptly withdrawing US troops from northern Syria, paving the way for Turkey to launch the offensive against the Kurds, US allies against the Islamic State group.

Under the deal struck Tuesday in Sochi, Russian military police and Syrian border guards will "facilitate the removal" of Kurdish People's Protection Units (YPG) fighters and their weapons from within 30 kilometres (18 miles) of the border.

It will also see Turkey preserve a "safe zone" inside Syria about 75 miles long and 20 miles deep. Russia and Turkey will eventually launch joint patrols along the zone.

"Big success on the Turkey/Syria Border. Safe Zone created! Ceasefire has held and combat missions have ended," the president tweeted. "Kurds are safe and have worked very nicely with us. Captured ISIS prisoners secured."

The prospect of thousands of Islamic State group jihadists escaping in the chaos after Turkey launched its military action on October 9 has caused widespread alarm in the West.