Tension has risen between the two sides after Pristina declared that by next April, around 10,000 Kosovan Serbs with licence plates issued by Serbia must replace them with plates from the Republic of Kosovo.
President Aleksandar Vucic has rejected a proposal from Germany and France to expedite Serbia's EU membership process in exchange for the country's recognition of Kosovo.
Under the deal, the two countries aim to develop co-operation on the basis of joint understanding and also respect the sovereignty and principle of non-interference in internal affairs.
Serbia's President Vucic said the following period will be a very difficult political struggle.
Some 6.5 million voters are choosing the president, a new parliament and local authorities in the capital, Belgrade, and over a dozen other towns and municipalities.
Turkiye's President President Recep Tayyip Erdogan has discussed the crisis in Bosnia with Serbian counterpart Aleksandar Vucic, adding that Ankara will step up its diplomacy on the matter.
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