Swiss voters were set to reject a proposal to cap the country’s population at 10 million in a referendum held on Sunday, according to preliminary projections by national broadcaster SRF.

The referendum is proposing a a limit of 10 million people until 2050 and has divided the country, being dubbed by some as a "Swiss Brexit".

Switzerland will vote in a referendum Sunday on limiting its population size – a proposal that could, if approved, set the country at odds with the European Union.