Bulgarian Minister of Foreign Affairs Nikolay Mladenov has implicitly sent a signal of warning to Macedonia regarding a long-going contest of historical and cultural heritage.

"Bulgaria is open to all its neighbors and supports the enlargement of the EU, but it will not allow anyone to tinker its history," said Mladenov at a cabinet sitting Wednesday.

At the meeting, Bulgaria's government adopted a proposal for Parliament to adopt a document to delineate the fundaments of Bulgaria's policy toward its neighbors.

Mladenov said that the document ought to also contain some "red lines" that cannot be crossed in bilateral relations.

The history issue with Macedonia was in presented as such a red line regarding that country, which was nevertheless not explicitly named by the Bulgarian Foreign Minister.

Mladenov also announced that next week a regular scheduled meeting with ambassadors from Balkan countries will take place.