In a phone conversation with NATO Secretary-General Jens Stoltenberg on Sunday, Erdogan said his country continues its "constructive attitude" toward Sweden's joining the alliance, according to a statement from his office.

But Erdogan said the Nordic country's change on terror laws does not meet the expectation of Ankara as long as the PKK can demonstrate in the country "freely."

Turkey has long been saying that Ankara will only admit Sweden's NATO bid in the upcoming Vilnius summit if the latter takes concrete steps to prevent anti-Turkey "terror" activities in the country, the statement said.

The latest developments in Russia were also discussed during the phone call, it added.