NEW : Authorities cancel all flights at Don Muang International Airport after blast ; Three wounded . Three people wounded at blast at Suvarnabhumi Airport . CNN 's Kocha Olarn contributed to this report . Pro- and anti-government protesters exchange gunfire . the People Power Party has been leading protests since October Thailand 's .
NEW : Authorities cancel all flights at Don Muang International Airport after blast ; Three wounded . Three people wounded at blast at Suvarnabhumi Airport . Pro- and anti-government protesters exchange gunfire . the People Power Party has been leading protests since October Thailand 's .