The head of a Serbian arms factory said that some weapons used by terrorists during the Paris attacks were made in Serbia in the late 1980s.
Milojko Brzakovic, director of the Zastava Arms factory, said they checked the serial numbers of around eight rifles received from police.
The M70 assault rifles were part of a batch sent to military depots in Slovenia, Bosnia and Macedonia, Mr Brzakovic told the Reuters news agency.
The Paris attacks claimed 130 lives.
Gunmen opened fire or set off bombs at seven locations during the attacks on 13 November.