DAMASCUS, May 12 (Xinhua) -- The U.S.-backed Syrian Democratic Forces (SDF) will discharge 3,000 foreign fighters from its ranks in three months, a war monitor reported on Sunday.

The decision comes following the defeat of the Islamic State (IS) in eastern Syria as the SDF and the U.S. coalition will be training Syrian fighters in areas under the SDF control to replace the foreign ones.

The foreign fighters, who are from Iranian and Turkish among other nationalities, will depart Syria, according to the Syrian Observatory for Human Rights.

The Britain-based watchdog group said the decision also comes in light of the protests against the SDF in northern and northeastern Syria.

In March, the SDF announced defeating the IS in the eastern part of Syria near the Iraqi border.