Thaugsuban told demonstrators gathered Sunday of plans to march on media outlets and government buildings Monday , calling on civil servants to join the cause . NEW : The Prime Minister broadens internal security measures . Anti-government protesters in Suthep have marched on government offices . 2010 's An estimated 40,000 turnout was country 's biggest demonstration since deadly Sunday stand-off . Protesters allege former Democrat exerts power through current premier , his sister .
NEW : The Prime Minister broadens internal security measures . Anti-government protesters in Suthep have marched on government offices . 2010 's An estimated 40,000 turnout was country 's biggest demonstration since deadly Sunday stand-off . Protesters allege former Democrat exerts power through current premier , his sister .