Members of the opposition People's Alliance for Democracy held their positions in front of the U.N. Economic and Social Commission for Asia and the Pacific building for the eighth straight day as of Sunday, Xinhua reported.
The group is demanding Thai Prime Minister Samak Sundaravej resign, saying he has lost credibility with the Thai people.
The group's leader, former Bangkok Gov. Chamlong Srimuang, slammed Samak for calling on police to end the protest.
Chamlong said action against the protesters was a decision best left for police officials and not the head of state.
"It is the duty of the police to solve traffic problems" the Thai News Agency quoted the opposition leader as saying.