Turkish President Recep Tayyip Erdogan will present special documents on Sweden and Finland's financial and political support of the Kurdistan Workers' Party (PKK), which Ankara considers a terrorist organization, at the upcoming NATO Madrid summit, Turkish newspaper Sabah reported on Sunday.

According to the newspaper, Erdogan will present "evidence" captured during military operations in Syria and northern Iraq, including photos and serial numbers of Swedish-made antitank guns AT-4. The Turkish president will also state that NATO cannot establish allied relations with Finland and Sweden as long as this hostile position continues, Sabah added.

On 18 May, Finland and Sweden submitted their NATO membership applications. Turkey blocked the applications' review process, citing Helsinki and Stockholm's long-standing support of the PKK, which Ankara deems as a serious threat to its national security.

The newspaper also said that Erdogan would put the issue of its rising tensions with Greece on the summit’s agenda.

Madrid will host the NATO summit on June 28-30.