BELGRADE, Serbia (AP) — At least three lawmakers were injured on Tuesday, one of them seriously, after chaotic scenes in Serbia’s parliament, during which smoke bombs and flares were thrown, further fueling political tensions in the Balkan country.

Serbian opposition lawmakers threw smoke grenades and used pepper spray inside parliament on Tuesday to protest against the government and to support demonstrating students, with one legislator suffering a stroke during the chaos.

Serbia’s National Assembly devolved into chaos after opposition ministers threw smoke and stun grenades at the ruling party members. During a Tuesday parliamentary session in Belgrade, opposition lawmakers interrupted proceedings with whistles and horns,