Hungary's emphatic vote to scrap EU migrant quotas has triggered a "domino effect" of anti-refugee sentiment across eastern Europe, with the leaders of Serbia and the Czech Republic joining calls to reject migrants from the bloc on Monday.

More than 98% of Hungarians voted to scrap the Brussels-imposed quotas in Sunday night's referendum, though it failed to meet the turnout threshold and was declared invalid.

Despite this, Viktor Orban, Hungary's hardline conservative prime minister, says he will push ahead with changing the constitution so that it is impossible for the EU to settle migrants in the country.

“Hungarians have written history...more Hungarians have supported the "No" this time than the EU membership in 2003,” he said on Monday.

He appeared to be comparing the 3.2m "No" voters in Sunday's referendum against the 3m people who opted to join the EU in a referendum held 13 years ago.