BANGKOK, Thailand —  Thailand's Parliament has postponed a joint session of Parliament as thousands of anti-government protesters surrounded the building in a bid to unseat the administration.

Samart Kaewmeechai, the deputy house speaker, said the Monday meeting was canceled because members of Parliament could not access the building.

Thousands of protesters from the People's Alliance for Democracy marched to Parliament at sunrise in a rally billed as their final bid to oust the government. Protesters have been camped at the prime minister's office compound for three months.

The parliamentary session was not immediately rescheduled.