"They do not sit in the room physically, but I think there were several separate conversations with representatives of several states today, including the Americans, and their role in the political sense is very important," he said.

The director of the Serbian Government's Office for Kosovo and Metohija made this statement when state broadcaster RTS asked about "American participation in negotiations in Brussels".

A round of the Kosovo dialogue ended late on Tuesday with "progress made, but no agreements reached."

According to Djuric, the Americans have much more influence in Pristina than many European states - "and those conducting the talks here as intermediaries, very often, I am under the impression, call them for help."