Turkey has rejected invitations by NATO to participate in trilateral talks with Finland and Sweden aimed at finding a solution to Ankara’s opposition to the Nordic countries’ applications to join the western military alliance, Financial Times reported.

Ankara has demanded concrete proposals from Helsinki and Stockholm to address its concerns over terrorism before agreeing to mediated talks, according to three people with knowledge of the discussions, forcing NATO officials to attempt to broker a deal through bilateral talks with each country.

A trilateral meeting mediated by NATO officials was the “ultimate objective . . . but we’re not there yet,” a senior official from the alliance told the Financial Times, citing Turkey’s unwillingness to participate and a lack of clarity regarding Ankara’s demands of the two applicants.

Turkish President Recep Tayyip Erdogan on Wednesday reiterated his demand for concessions from the two Nordic nations. “Until Sweden and Finland show clear, concrete and decisive steps we will definitely not change our stance on the NATO issue,” he said.

Asked about a failure to hold trilateral talks, NATO secretary-general Jens Stoltenberg said this week that “we have a process now where there have been meetings in different formats.”