Serbia's match with Albania was abandoned after a drone carrying a political message sparked clashes involving players and fans on the Partizan Stadium pitch.
The Euro 2016 qualifier, refereed by English official Martin Atkinson, was suspended in the 41st minute at 0-0.
Trouble flared when an Albanian flag and message flew above the pitch and was caught by a Serbia player.
Albania players tried to take it before several fans broke onto the pitch.
Atkinson led the players off the field and, after a delay of around 30 minutes, Uefa confirmed the match had been abandoned.
Albanian fans had been banned from attending the qualifier between the two Balkan rival nations.
Serbia and Albania have a history of turbulent relations, predominantly in relation to the former Serbian province of Kosovo, which declared independence in 2008.
It has been recognised by the United States and major European Union countries, but Serbia refuses to to do, as do most ethnic Serbs inside Kosovo.
"It is a regretful situation on which we will report; the referee, myself and the security advisor. The circumstances were such that we couldn't continue the match," Uefa match delegate Harry Been said.
"You all saw what happened and I cannot comment on who is to blame or what to blame. I will submit a report with my colleagues to Uefa and Uefa will decide what will happen further."

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