The press service of Slovak Prime Minister Robert Fico announced this afternoon that he has not received medical clearance to travel by plane to Serbia.

Axar.az reports, citing Vijesti, that the Slovak Prime Minister's office made the remarks in a statement.

"Due to the consequences of the assassination attempt, his health condition still does not allow him to travel by plane, although his great desire was to come to Belgrade in person and attend the large national rally of the Aleksandar Vucic - United Serbia list," the statement reads.

"To our great regret, the Prime Minister of the Slovak Republic will not be able to attend the large public gathering at the Belgrade Arena," the statement added.

Fico said earlier today that he has been "fighting the virus" all week and that he will try to attend the rally organized by the Serbian Progressive Party (SNS) in Belgrade.

He wrote on social media that he did not go to a rally in Dukla, on the Slovakian-Polish border, due to the virus, and that he would "try to pull himself together" to travel to Belgrade.