Thai government will impose a curfew in parts of Bangkok starting on Sunday evening, a government source said.
"The curfew would be imposed on areas which lead to the main protest site starting Sunday evening from 11 p.m. to 5 a.m," said a government source close to the prime minister, adding that details would be announced at a media briefing on Sunday.
A curfew would allow authorities to prevent civilians from entering or leaving certain areas. Violation could result in a maximum penalty to two years in prison.
Thousands of anti-government protesters have been gathering in central Bangkok since April 3. Three days of fighting has killed at least 24 people, spiralling into chaotic urban warfare.