Photo: The Canadian Press. All rights reserved.
Thai anti-government protest leader Suthep Thaugsuban waves to supporters while making his way to the street during a mass rally in Bangkok, Thailand Monday, May 19, 2014. Earlier this month, the country's political crisis deepened after the Constitutional Court removed caretaker Prime Minister Yingluck Shinawatra for nepotism along with nine Cabinet members in a case that many viewed as politically motivated.(AP Photo/Sakchai Lalit)
Thailand's army has declared martial law in a surprise announcement in Bangkok.
It was not immediately clear whether a coup d'etat was underway.
The move comes after six months of anti-government demonstrations aimed at ousting the government.
The army said in a statement that it took the action to "keep peace and order."