Riot police in Georgia have fired tear gas and water cannon to disperse crowds protesting against a bill seen by the opposition as targeting media freedoms.
Pro-EU protesters clashed with police outside parliament, denouncing what they see as a Russian-inspired law.
Dozens of people were arrested and an opposition party leader was hurt.
Georgian MPs have given their initial backing to the "foreign agent" bill, despite the EU warning that it could harm Tbilisi's bid to join the bloc.
Parliament is expected to hold a second vote on the bill on Wednesday.
Georgia was granted EU candidate status last December and polls suggest about 80% of the population is in favour of joining.
Protests against the bill began in mid-April, after the ruling Georgian Dream party proposed measures requiring non-governmental organisations (NGOs) and independent media to register as organisations "bearing the interests of a foreign power", if they receive more than 20% of their funding from foreign donors.
They would also be monitored by Georgia's justice ministry and could be forced to share sensitive information - or face hefty fines of up to 25,000 Georgian lari ($9,400; £7,500).
Opponents say the measures are inspired by authoritarian legislation that neighbouring Russia uses to crush dissent. But the billionaire founder of the Georgian Dream party, Bidzina Ivanishvili, claims a Western "global war" party is using the country as part of its confrontation with Russia.
Several protesters were injured during the clashes on Rustaveli Avenue, outside parliament in Tbilisi, on Tuesday night.
Among them, according to Georgian media, was Levan Khabeishvili, chairman of the main opposition party United National Movement (UNM). He posted a picture of his bruised face on social media.
Eyewitnesses accused some police officers of physically attacking protesters. Interior ministry officials said six officers were hurt and 63 people arrested.
Protesters fear that the proposed foreign influence bill could be used to crush critical voices ahead of the parliamentary elections later this year.
A similar authoritarian law that came into force in Russia in 2012 has since used to marginalise voices challenging the Kremlin - including prominent cultural figures, media organisations and civil society groups.
Many Georgians fear the measures will derail Georgia from its path towards the much-coveted status of EU membership, says the BBC's South Caucasus correspondent, Rayhan Demytrie.
A number of European leaders have warned the proposed bill is "incompatible" with European norms and values.
But the government of Georgian Prime Minister Irakli Kobakhidze is standing firm.
Mr Kobakhidze has accused NGOs of attempting to stage revolutions in Georgia twice, of promoting "gay propaganda" and of attacking the Georgian Orthodox Church.
The government insists the bill is about ensuring transparency and rejects the notion that it is against European values - or that Russia is behind the legislation.
On Monday, Bidzina Ivanishvili told a rally of Georgian Dream supporters that foreign-funded NGOs threatened Georgian sovereignty and that the opposition UNM would be punished for crimes against the state after this year's elections.
Georgia's ceremonial president, Salome Zourabichvili, described the pro-government rally as a "Putin-type" event.
Ms Zourabichvili, who is strongly opposed to the foreign influence bill, has appealed to the interior ministry to stop using "disproportionate force" against protesters.
