What's this all about? Anything to be concerned about?
"The Thai Government has imposed the Internal Security Act in three districts of Bangkok - Dusit, Pom Prab, and Phra Nakorn - until 30 November 2013. During this period, a number of political demonstrations are expected to take place in central Bangkok. Protest areas may include Ratchadamnoen Avenue, Silom Road, Ratchaprasong intersection, Sam Sen train station, Lumphini Park, and Uruphong intersection."
http://www.mfa.gov.sg/content/mfa/consular_information/for_singapore_citizens/travel_notices/2013/201311/travelnotice_20131105.html