A top Danish official said Wednesday that a “fundamental disagreement” over Greenland remains with President Donald Trump after highly anticipated talks in Washington with Vice President JD Vance and Secretary of State Marco Rubio.

The two sides, however, agreed to create a working group to discuss ways to work through differences as Trump continues to call for a U.S. takeover of the semi-autonomous territory of NATO ally Denmark.

“The group, in our view, should focus on how to address the American security concerns, while at the same time respecting the red lines of the Kingdom of Denmark,” Danish Foreign Minister Lars Løkke Rasmussen told reporters after joining Greenland’s foreign minister, Vivian Motzfeldt, for the talks.