Turkey has illegally forced thousands of refugees to return to Syria, a report by Amnesty International says.

The group says about 100 Syrians have been sent back to their war-torn country every day since mid-January in breach of international law.

Amnesty says its report exposes the flaws in a recent deal between the EU and Turkey aimed at stemming the flow of refugees arriving in Greece.

Turkey has denied sending back any refugees against their will.

The Amnesty report comes just days before Turkey is expected to receive the first migrants returned from Greece under the deal with the EU. On Friday the UN called for safeguards before any migrants were returned.