Security forces in the city of Monywa opened fire on anti-coup protesters on Saturday, killing at least two people according to local media.
Thai authorities along the country's northwestern border braced themselves Monday for a possible influx of more ethnic Karen villagers fleeing new airstrikes from the Myanmar military.
Jeanine Anez, the conservative interim president who led Bolivia for a year, was arrested on Saturday and released after questioning.
The demonstrators used water, blankets and fire extinguishers to try to smother the smoking canisters but were eventually forced to give ground and disperse.
The escalation of violence in Myanmar as authorities crack down on protests against the February 1 coup is raising pressure for more sanctions against the junta.
Security forces in Myanmar escalated their crackdown on protests against last month’s military coup, with at least 38 people killed on Wednesday.
The rally drew hundreds of protesters, who sang and danced to the beat while holding up the three-fingered salute that has come to symbolise resistance to the coup.
About 3,000 teachers and students stood their ground a short distance from the barricades and barbed wire as the police watched impassively, holding riot shields and cradling rifles.
The coup was declared a failure when the king appeared on television to support the new democratic government. Before his televised speech, the country had been holding its breath for the 18 hours that the ordeal at the Parliament lasted.
The military junta warned it was prepared to use lethal force against rallies inciting "riot and anarchy".
Thousands of protesters rally near Yangon's central Sule pagoda in one of the biggest protests in Myanmar since the military coup on February 1.
A near-total internet shutdown was reported on Sunday night, as mass protests against the military coup entered their second week.