Belgrade: Serbian Prime Minister Aleksandar Vucic has dismissed suggestions that he had been subject to an assassination attempt, seeking to calm tensions after the discovery of a cache of heavy weapons on a route regularly taken by his motorcade.

The weapons, which included a rocket launcher, hand grenades and rifle ammunition, were found in bushes in the neighbourhood of Jajinci, near a crossroads where Mr Vucic's motorcade normally slows on his frequent visits to his parents' home.

Serbian Prime Minister Aleksandar Vucic rejects talk of assassination on Sunday. Credit:AP

"Someone could have simply dumped weapons there by chance," he told reporters at a Sunday press briefing held to discuss a visit by an International Monetary Fund mission.

"This was not an assassination attempt," he said. "Nobody touched me."