A Thai man, believed to be an anti-government protestor, was found shot dead in Chatuchak district, police said Tuesday.
Pirapat Sutthasena, a police officer, said he received a report about the incident in the morning, the Bangkok Post reported.
The victim wore a shirt with a 'Fight for Democracy' message written on it and a wristband bearing the national flag.
The man, aged about 30 years, was shot three times in the chest. His body was covered with bruises and there were marks indicating that he had been tied up.
Pirapat said it was likely that the man was tortured before he was killed and his body was dumped in a deserted area.
He said police were investigating if the murder was in connection with the anti-government protests led by the People's Democratic Reform Committee.