Authorities said late last week at least 32 people had been killed in an area that includes the city of Meikhtila but there were no later reports of casualties.
Entire neighborhoods in Meikhtila were burned down and dozens of people had been arrested, the Bangkok Post reported.
Thousands of people were said to be living in relief camps.
The violence began Wednesday in Meikhtila with a fight between a Muslim shopkeeper and Buddhist customer and spread throughout the area, authorities said.
The central government ordered soldiers into the city to restore calm but street battles continued, Voice of America reported.
International aid workers were handing out food and trying to find shelter for people whose homes were destroyed.