"We are following the developments regarding Sweden and Finland, but we don't hold positive views," Erdogan told reporters in Istanbul, adding it had been a mistake for NATO to accept Greece as a member in the past.
"As Turkey, we don't want to repeat similar mistakes. Furthermore, Scandinavian countries are guesthouses for terrorist organisations," Erdogan said, without giving details.
"They are even members of the parliament in some countries. It is not possible for us to be in favour," he added."