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Recep Tayyip Erdogan
Photo: GONZALO FUENTES / REUTERS
Turkish President Recep Tayyip Erdoğan has signaled no willingness to compromise on NATO's northern expansion.
"Tomorrow we will go to the NATO summit in Spain and do everything necessary in accordance with the rights and interests of our country," Erdoğan said, according to the government.
The "hypocrisy" towards "terrorist organizations" will be explained to the interlocutors with "documents, information and pictures".
Erdoğan has lodged an objection to Sweden and Finland joining NATO.
He accuses them of supporting "terrorist organizations".
The 30 NATO countries will meet in Madrid on Tuesday for a multi-day summit.
Member States want to convince Erdoğan
On the fringes of the meeting, another attempt is to be made to overcome the Turkish blockade.
NATO Secretary General Jens Stoltenberg will meet Sweden's Prime Minister Magdalena Andersson, Finnish President Sauli Niinistö and Erdoğan.
The Turkish reference to "terrorist organizations" refers to the banned Kurdish Workers' Party PKK and the Syrian Kurdish militia YPG, which Sweden and Finland are said to support - which both countries deny.
Sweden and Finland applied for NATO membership in mid-May.
Erdoğan also repeated his announcement of a new offensive in Syria.
It will begin as soon as the preparations are complete.
Ankara justifies this with the fight against the YPG.
The country already occupies areas in northern Syria.
svs/dpa