The incident escalated a campaign by the ousted Law and Justice party to resist the transfer of power after it lost its parliamentary majority in October.
The sit-in shut down Poland’s main public news station, a possible harbinger of battles to come as the party voted out of power tries to keep its grip on state institutions.
Prime Minister Donald Tusk is sworn in and vows to try to invigorate flagging European support for Ukraine and push for “full mobilization” against Russia’s military assault.
Parliament rejected a new government proposed by the caretaker prime minister, Mateusz Morawiecki, whose party, Law and Justice, lost its parliamentary majority in an October election.
A border blockade by haulers angry that the European Union has suspended a permit system for their Ukrainian counterparts has led to problems with deliveries of wartime supplies.