A bus ran into a crowd in the city of Gonaives in northern Haiti on Sunday, killing at least 34 people and wounded 17 others, local report in capital Port-au-Prince quoted Haitian rescue officials as saying.
The incident left dozens of people injured, who were quickly transported to hospital by the emergency services.
The bus was travelling to the country's capital, Port-au-Prince, which is around 90 miles north of Gonaïves, when the crash happened.
The musicians were taking part in a rara parade, which involves playing traditional instruments and being joined by passers-by.
"The bus, the passengers and the driver were placed under protection at the station in Gonaives".
Director of the Civil Protection Authority, Marie-Alta Jean Baptiste, told Agence France Presse that the driver attempted to flee from the scene and while speeding away, hit three bands of Rara musicians, Haiti street performers.
In a statement, Haitian President Jovenel Moise "expressed his deep sadness following the awful accident".
It is unclear what caused the initial accident. Haiti's roads are notoriously risky, with road safety rarely observed by drivers and other users.