Finland and Sweden have accepted that Turkey has expressed concerns about their NATO membership requests, and the three countries will now meet again, according to Sweden’s main accession negotiator on Thursday.

The Kurdish Workers Party (PKK), which is regarded as a terrorist organization by Ankara and its Western allies, is said to be harbored in Sweden and Finland, according to Turkey, which unexpectedly objected to the two nations’ application to join NATO last year.

“We see that Turkey recognized that both Sweden and Finland have taken concrete steps in this agreement, which is a good sign,” chief negotiator Oscar Stenstrom told a news conference at NATO headquarters after trilateral talks resumed.

“A little step forward, the talks have restarted and we have agreed that we will continue to meet and I can’t say exactly when.”

President Tayyip Erdogan’s spokesman, Ibrahim Kalin, said steps taken by Sweden and Finland to address Ankara’s security concerns were positive, but not enough for Turkey’s ratification of their NATO bid.

“We have once again highlighted Turkey’s security concerns and expectations,” he said. “The steps to be taken by the countries will determine the course and speed of this issue.”

In January, Turkey suspended talks set up as part of a trilateral deal agreed in Madrid last year aimed at smoothing Finland and Sweden’s accession process.

The immediate cause was a protest near the Turkish embassy in Stockholm at which a far-right politician burned a copy of the Muslim holy book, the Koran.

But Ankara has consistently said that Sweden in particular has failed to implement its part of the Madrid agreement.

Stenstrom said Sweden had fulfilled its part of the bargain. As part of its efforts to reassure Turkey it is taking its fears over militants seriously, the government will introduce an new anti-terrorism bill to parliament this week.

The new law, work on which started in 2017 after a truck was driven into crowds in Stockholm killing five people, would criminalise “participation in a terrorist organisation”, the government said.