Shortly afterward, they sprayed tear gas and forced their way into a room that had been barricaded by Melia and his supporters.
Melia, chairman of the United National Movement, is accused of organising “mass violence” during anti-government protests in 2019.
The ruling Georgian Dream party, led by the nation's richest man, narrowly won the October 31 parliamentary vote that opposition parties say was rigged.
With elections looming at the weekend, Georgia's political and economic progress to date could be at the stake as it comes under increasing pressure from private interests and malign Russian influence.
The ruling Georgian Dream party has nominated Interior Minister Giorgi Gakharia for the post of prime minister amid controversy over his handling of anti-Kremlin protests earlier this year.
Georgia warned Friday of the risk of a "serious confrontation" with Russia-backed South Ossetia after the breakaway region demanded that Georgian authorities remove a checkpoint on its disputed boundary.
Realistic and ambitious: Georgia's push toward Europe
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Ex-president Saakashvili could return to Georgia, says expert