Hundreds of Haitians have chanted "Down with kidnapping! Down with dictatorship!" as they marched through the streets of Port-au-Prince in support of opposition leaders who stepped up their demands for President Jovenel Moise to resign.
The protest on Wednesday was the biggest one yet this year and came just days after Moise announced police had arrested nearly two dozen people accused of an alleged coup conspiracy, including a Supreme Court judge, who was ordered released on Wednesday.
Opposition leaders labelled the arrests as political repression while critics accuse Moise of trying to become more powerful.
"We're all asking for the population to rise up," said former senator Youri Latortue, one of Haiti's opposition leaders. "We're not backing down."
The opposition coalition recently announced another Supreme Court judge, Joseph Mecene Jean-Louis, had become Haiti's supposed transitional president. Jean-Louis accepted the position, which no one in the international community has recognised.
The opposition claims Moise's five-year term ended on February 7 but Mr Moise has insisted it ends in February 2022, since he wasn't sworn in until 2017.
Before that, a provisional president ruled Haiti for one year following chaotic elections marred by allegations of fraud.
The situation in Haiti has caught the attention of the international community, prompting a public statement from the US embassy in Haiti on Tuesday, a day after Moise's administration essentially sacked three Superior Court judges by announcing they had been forced into retirement.
Among the three is Jean-Louis and Yvickel Dabrezil, who was arrested on Sunday.