The officers were getting ready for morning duties at their station in Pattani province when the place was hit by explosions from a grenade and a car bomb, CNN reported, quoting an officer at the station.
The attacks killed one officer and wounded at least 44 others.
Southern Thailand has long been the scene of violence blamed on Muslim separatists seeking to have their own state in the region made up of Pattani, Yala and Narthiwat provinces, the report said. People in these regions are largely Malay-speaking Muslims while Thailand is mostly Buddhist.
Notable deaths of 2014 [PHOTOS]
Syrian Al Qaida group executes Lebanese soldier