Anti-government protesters wave flags as they march through Bangkok's financial district, Jan. 21, 2014.
Anti-government protesters block the main gate of the Ministry of Natural Resources during a rally in Bangkok, Jan. 21, 2014.
An anti-government protester holds a placard and chants slogans during a rally at Victory Monument intersection in Bangkok, Jan. 21, 2014.
Medical workers display placards in support of an anti-government march in Bangkok, Jan. 20, 2014.
Police officers investigate the scene where an explosion took place near a camp of anti-government protesters at the Victory Monument in Bangkok, Jan. 19, 2014.
Military medics walk near the site of an explosion in Bangkok, Jan. 19, 2014.
Anti-government protest leader Suthep Thaugsuban receives donations from supporters as he leads protesters in a march in Bangkok, Jan. 19, 2014.
Anti-government protesters march during a rally in central Bangkok, Jan. 17, 2014.
Injured anti-government protesters are carried by other protesters after an explosion during a demonstration in Bangkok, Jan. 17, 2014.