At least four people were killed, and dozens injured, during recent attacks on anti-government demonstrations around the country.
Emergency officials say a bombing at a protest Sunday in central Bangkok, left two people dead, including a 12-year-old boy. Officials say 22 others were also injured.
On Saturday, authorities said at least two people were killed and around 41 wounded, when unidentified gunmen attacked an anti-government rally in the province of Trat, about 300 kilometers east of the capital.
About 500 supporters of the opposition People's Democratic Reform Committee were gathered when the gunmen drove by in two pickup trucks, throwing at least two explosive devices and firing randomly into the crowd.
The attacks were the latest in a series of violent clashes that have left at least 17 people dead since November.
The unrest is the country's worst political violence since 2010. Prime Minister Yingluck Shinawatra's opponents contend her government is corrupt and controlled by her billionaire brother, exiled ex-prime minister Thaksin Shinawatra.
Ms. Yingluck tried to resolve the conflict with early elections this month, but the opposition boycotted the vote and disrupted it in several areas, preventing a definitive result until more polls can be held.