"Serbia had deployed 8,350 troops near (the border) ... with Kosovo, ... and reduced them to 4,500 at the moment," Mojsilovic said.
He said the army presence in the so-called Ground Safety Zone, a 5 kilometre-wide (3-mile) strip inside Serbia along the Kosovo border, had "reverted to normal."
Serbia has not "formally raised the level of readiness" of its 22,500-strong army, Mojsilovic said.
Some 50,000 Serbs who live in northern Kosovo do not recognise Pristina's institutions and see Belgrade as their capital.
NATO, which still has 4,500 troops in Kosovo, said on Friday it had "authorised additional forces to address the current situation".
Persons:
General Milan Mojsilovic, Mojsilovic, Milan Radoicic, Ivana Sekularac, Aleksandar Vasovic, Alex Richardson
Organizations:
BELGRADE, Reuters, NATO, Kosovo police, Belgrade
Locations:
Serbia, Kosovo, Belgrade, Pristina, Kosovo's, Banjska, Serbian, Albanian Kosovo, United States, Kosovo Serb