Minister of Foreign Affairs Pekka Haavisto (Green) told Yle's A-studio current affairs programme on Tuesday evening that he has "reservations" about the idea of Finland and Sweden receiving separate security guarantees from the Nato member states that have already ratified the two Nordic countries' membership applications.So far, 28 of Nato's 30 current members have given a green light to the Finnish and Swedish applications, with Turkey and Hungary the only countries yet to do so.In an interview with the Lännen Media newspaper group, Nato's former Deputy Assistant Secretary-General Stephanie Babst suggested that the 28 countries that have ratified Finland's and Sweden's membership could offer Article 5 guarantees, even though the accession process is still ongoing.Now it is important to put pressure on Turkey, so that Turkey and Hungary ratify the applications," Haavisto said during the A-studio interview.He added that such "creative thinking" — as Babst's suggestion — indicates that Nato and other member states are becoming frustrated at the delay in the ratification process."