Georgian police on Saturday fired tear gas at anti-government protesters to force them away from the presidential palace in the capital, Tbilisi.

Waving Georgian and EU flags, tens of thousands flooded Tbilisi's Freedom Square, heeding the opposition's call to protest local elections.

Armored riot police drove back protesters who tried to force entry to the presidential palace in the final minutes before polls closed in municipal elections after some opposition figures called for a "peaceful revolution" against the ruling Georgian Dream Party.

Georgian Dream, which is seen as pro-Russia, is facing its first electoral challenge since winning the parliamentary vote that critics say was fraudulent a year ago. Since then, the country's pro-Western opposition has been staging protests. 

The party claimed victory after polls closed at 1600 GMT/UTC. In a Facebook post, Georgian Dream said it had "won elections in all municipalities without exception."

Official results are expected in the evening.

Why did protesters try to enter the presidential palace in Tbilisi?

Georgia's local elections became a high-stakes battle following months of crackdowns on independent media, the introduction of laws limiting civil society, and the imprisonment of several activists and political opponents.

Jailed ex-President Mikheil Saakashvili had called on Georgians to protest on election day for what he called the "last chance" to save the country.

"There are moments when action is needed here and now," he wrote on Facebook on Thursday. "Freedom is now or never!" Saakashvili added.

On Saturday, protesters headed toward the presidential palace and tried to enter the compound, prompting riot police to use tear gas. 

Crackdown on government critics in Georgia

Prime Minister Irakli Kobakhidze accused organizers of "radicalism" and threatened that "many may find themselves behind bars."

Over the past year, some 60 people, including key opposition figures, journalists and activists, have been jailed, according to rights groups.

In a statement published Friday, Amnesty International said the elections in Georgia were "taking place amid severe political reprisals against opposition figures and civil society."

"With opposition leaders jailed and civil society organisations under attack... people's rights to freedom of expression, association and peaceful assembly are being crushed," the statement added.

Edited by Sean Sinico