The president and the government of Serbia will address the European Commission (EC) in a letter, looking for answers to a range of questions.

Serbian Prime Minister Ana Brnabić announced this late on Monday.

Brnabić added that the letter would be addressed to the EC, after it announced that the cases of Catalonia and Kosovo cannot be compared. According to her, the letter "above all will raise the question - is there one international law applicable to the EU, and another international law applicable to all other countries which are not members of the EU."

Brnabić made this statement after urgent consultations in Belgrade that President Aleksandar Vučić called earlier the day.

"Realistically, we have been very surprised by the position of the European Commission, and everything that (its) spokesman has said. We wanted to see how to react in terms of what we should further ask the Commission," Brnabić told reporters, reports B92.

"Among the issues will be whether international law is valid for the EU, or if there is some other international law applicable to all other, non-EU countries," the prime minister said.

"I will travel to Brussels on a previously arranged visit on October 10 and 11, and I will certainly at that time take with me our letter, and this will certainly be one of the topics," said she.

Brnabić also stated that the letter would be forwarded to all countries that have not recognized the so-called state of Kosovo - "to thank them and let them know how important it is that they did not do it, and how right they had been when they defended international law, and believed in it."

The prime minister said that the letter would also be sent to those who have recognized Kosovo - in order to ask the same questions - "and perhaps, they will have some answers for Serbia."