A second group of about 600 people led by opposition leader Maryse Narcisse placed a flower Friday morning in a school yard to mark the anniversary of an election day massacre 26 years ago.
Some of the protesters displayed banners supporting former President Jean-Bertrand Aristide and his Lavalas Family party, which Narcisse leads.
Haiti has seen a spike in protests in recent months, with a few of them turning violent.
Demonstrators have objected to the rising cost of living, government waste and corruption, and the long delay of legislative and local elections.
Aristide's political party has said it wants to run in the elections for which there's still no date.