“If necessary, we can send a different message regarding Finland if it does not repeat the same mistakes,” TASS quoted Erdogan as saying.
He admitted that the Swedish authorities may be "shocked" by Ankara's possible decision.
On January 26, Turkish Foreign Minister Mevlut Cavusoglu said that Turkey sees no point in negotiating with Sweden and Finland to join NATO.
The head of the Swedish Foreign Ministry, Tobias Billström, said that Sweden interrupted the process of joining NATO because of actions with the desecration of the Koran.
He expressed hope that agreements on NATO expansion with Ankara could be reached at the summit of the foreign ministries of the alliance countries in Vilnius in July.