Belgium says it can only back the EU-Canada trade deal if there is an unanimity. 

In a phone call early on Friday, Belgian Prime Minister Charles Michel spoke with his Canadian counterpart Justin Trudeau said officials from the EU and its Wallonia region failed to find a compromise.

Begium's Wallonia region said so-called CETA deal is a threat to farmers and welfare standards, and allows multinationals to skirt regulations.

The deal is just one of the various issues sought to be resolved during the EU summit in Brussels, which is now into its second day. The bloc also discussed Russia's actions in Syria, and UK's exit from the bloc.