Two of the top Ukrainian security officials were set to regroup on Wednesday in Brussels with several European counterparts to discuss the outcomes of Tuesday’s U.S.-Russia meeting in Moscow, the Ukrainian presidential office said in a statement.

Rustem Umerov, secretary of the National Security and Defense Council, and Andrii Hnatov, chief of the General Staff, were expected to join those talks in Belgium, which would follow a day after top U.S. officials held a high-stakes sit-down with Russian President Vladimir Putin in Moscow.

“This is our ongoing coordination with partners, and we ensure that the negotiation process is fully active,” Ukrainian President Volodymyr Zelenskyy said on Wednesday on social media.

The Kremlin’s top foreign policy aide said Tuesday’s hourslong talks in Moscow had been “useful” but added that “no compromise plan” had been found yet on the toughest issues.

After their meetings in Brussels, Umerov Hnatov were expected to begin preparations for a meeting with envoys of the Trump administration, Zelenskyy said.

This is a developing story. Please check back for updates.