Turkey expects Sweden and Finland to take "concrete action" and stop what it calls "support for terrorist groups" in order for Ankara to drop its objections to their entry into NATO, said Foreign Minister Mevlut Cavusoglu.
Last week, Finland and Sweden officially applied to join NATO. However, Turkey opposed the move, accusing the countries of harboring people associated with the Kurdistan Workers' Party (PKK) and followers of Fethullah Gülen, whom Ankara accuses of masterminding the 2016 coup attempt.
All 30 NATO states must give their consent for the admission of a new member.
On Wednesday, delegations from the two countries visited Ankara for talks with Turkish officials.
A spokesman for President Tayyip Erdogan later said that Ankara had received positive signals to lift the arms embargo. After that, Swedish Foreign Minister Ann Linde said on Twitter that the dialogue was constructive.
Sweden and Finland banned arms exports to Turkey after invading Syria.