Turkey called on Washington Wednesday to prevent US-backed Kurds from sending fighters deployed against ISIS militants to shore up Kurdish forces battling a Turkish offensive in northwestern Syria’s Afrin region. President Recep Tayyip Erdogans spokesman said that Ankara wants the US to "step in and prevent" the redeployment. Turkey sent troops into the Afrin enclave on Jan. 20 to drive out Syrian Kurdish fighters it considers to be terrorists. US officials have warned that Turkeys offensive could undermine the fight against the ISIS. Erdogans spokesman, Ibrahim Kalin, rejected that, saying the aim was to clear Syria of all terror groups. At a news conference on Tuesday, the Syrian Democratic Forces (SDF) announced it would pull fighters out of areas of eastern Syria, where they have been fighting pockets of ISIS militants, in order to shore up defenses in Afrin.  "We took the difficult decision to pull our forces out of Deir Ezzor province and battlefronts against ISS to head to the Afrin battle," said Abu Omar al-Idlibi, an SDF commander, saying his fighters numbered 1,700. US and coalition officials have said they will not get involved in the Afrin fighting and expressed concern it would detract from the SDFs operations against ISIS. But Idlibi said: “Our people in Afrin are our priority. Protecting them is more important than the international coalitions decisions." He said his units, mostly made up of Syrian Arabs from the north of the country, were to be redeployed in the coming week.