In this June 20, 2018 photo, the Union and European Union flags are flown in unison during an anti-Brexit demonstration outside the Houses of Parliament in London. (NIKLAS HALLE'N / AFP)

LUXEMBOURG — Austria's European affairs minister says Brexit talks are making progress but that an imminent breakthrough appears unlikely.

A day ahead of a "moment of truth" EU summit, Gernot Bluemel said the "the dynamics in the negotiations are going in the right direction."

However, he said Tuesday that a compromise deal in time for this week's two-day summit was unlikely.

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Bluemel's voice matters as his country holds the EU's rotating presidency.

Britain is set to leave the European Union in March, but a Brexit agreement must be sealed in coming weeks to leave enough time for relevant parliaments to ratify it.

The talks have got bogged down over how to make sure a physical border does not reappear between Northern Ireland in the UK and EU member state Ireland.

READ MORE: May wins backing to finalize Brexit for March 29, 2019