Suzana Vasiljevic, Serbia’s President Aleksandar Vucic media advisor, said on Friday the meeting with Richard Grenell, the US head of state Donald Trump’s envoy to Kosovo, was challenging, but could not go into the details of the talks, the Beta news agency reported.

Speaking to the Prva TV, Vasiljevic said the two spoke alone in the first ten minutes, after which the head of Serbia’s Government Office for Kosovo and Metohija Marko Djuric joined the meeting.