Finnish President Sauli Niinistö said that on Monday he and Nato Secretary General Jens Stoltenberg discussed the "principles and procedures involved" in the military alliance's acceptance of new members.
In a post on Facebook on Tuesday, Niinistö said that Finland's security must be further strengthened and that all possibilities and prospects need to be explored.
"To this end, during [Monday's] discussion with Secretary General Stoltenberg, Nato's principles and procedures for accepting new members were thoroughly reviewed," Niinistö wrote on Facebook.
The post, written in Finnish, was shared on Twitter.
The President's Office issued a statement about Niinstö's phone call with Stoltenberg on Monday.
"President Niinistö and Secretary General Stoltenberg discussed Russia's attack on Ukraine and exchanged views on the prospects of a ceasefire, of a negotiated solution and of an end to the war. In addition, the President and the Secretary General talked about the development of the relationship between Finland and Nato. President Niinistö thanked Secretary General Stoltenberg for the strengthened interaction between Finland and Nato during the past month," the statement read.
The president noted on his personal Twitter account that he and Stoltenberg "discussed the prospects of an end to Russia's war against Ukraine."