Serbia's President Aleksandar Vucic has announced tough measures against anti-government protesters following days of riots challenging his rule.

STORY: Supporters of Serbia's ruling party threw flares and firecrackers at anti-government protesters in the city of Novi Sad on Wednesday prompting police to intervene to end the standoff.The violence was an escalation of nine-month-long protests in Serbia.

Protests erupted across Serbia, targeting the ruling Serbian Progressive Party amid allegations of corruption. Offices were destroyed in Novi Sad, and clashes occurred with police and supporters of President Aleksandar Vucic in Belgrade.

Clashes between rival groups of protesters in Serbia left dozens injured overnight, police said Thursday, as months of anti-government demonstrations boiled over into street violence for a second night.

Anti-government protests have intensified in Serbia, leading to the demolition of the ruling party's offices in Novi Sad and clashes in Belgrade. The protests, fueled by anger over a recent disaster and alleged corruption,

Clashes between rival groups of protesters in Serbia flared again late Thursday, police said, as months of anti-government demonstrations boiled over into street violence this week.

NOVI SAD, Serbia -- Several hundred people have gathered in the center of Novi Sad for what has been described as the northern Serbian city's first gay-pride rally.