The cleaners had scrubbed the debating chamber clean before MPs arrived for Wednesday's session in Serbia's National Assembly. Spent smoke bombs, smears of egg yolk and a dusting of white fire extinguisher powder had all been removed from the benches and tables after the mayhem of the previous day.

Serbian opposition lawmakers lit flares and discharged suspected tear gas during the opening day of the spring session of parliament on Tuesday, in a sign of support for ongoing anti-corruption protests.

The Serbian parliament erupted into chaos Tuesday as opposition lawmakers set off smoke grenades and other countermeasures to block last-minute passage of a series of laws initiated by the outgoing government.