Georgia's prime minister on Tuesday threatened to punish his political opponents, accusing them of being behind violence at mass protests, as Tbilisi's top court rejected a key lawsuit to annul the result of a contested October vote.

A fourth day of protests in the former Soviet republic sees thousands of protesters calling for EU membership talks to continue.

Days of protests have rocked Georgia following the government’s controversial decision to delay the former Soviet country’s bid to join the European Union.

The ancient streets of Georgia's capital city were again choked with smoke on Sunday night, as anti-government protests continued into a fourth consecutive night.

Protests erupt in Georgia after pro-Putin Dream Party leader stalls talks to join the EU over claims of foreign interference in country. (Credit: AP)

Protesters rallied in Georgia’s capital for a fourth straight night on Sunday and there were signs that opposition was spreading across the country to the government’s decision to suspend talks on joining the European Union.

Pro-European Union protesters have clashed with police in Georgia’s capital of Tbilisi for the fourth consecutive night.