Clashes broke out between protesters demanding the resignation of President Jovenel Moise and law enforcement in Port-au-Prince on Sunday.
Footage shows police forces firing tear gas at the demonstrators, who set a petrol station and a government building on fire and flipped over a vehicle.
An injured man is seen being bandaged by medical staff.
One of the protesters, Jean Pierre, said: "We are against the president Jovenel and against the system in general, even though many of us have been killed and are injured. We will not be discouraged. Because Haiti is our country, we as Haitian youth should fight for the self-determination of the country so that Haiti can be developed."
Anti-government protests against the Haitian President Jovenel Moise began in February in impoverished quarters of Port-au-Prince. Demonstrators are protesting against the country's corruption, double-digit inflation, and poor living conditions.
The accusations against Moise stem from a scandal involving the misuse of money from the PetroCaribe fund.
PetroCaribe - the brainchild of late Venezuelan leader Hugo Chavez - allowed participating countries to purchase cheap petroleum products with reduced interest rates. Haitian investigations into the alleged misuse of nearly $2 billion (€1.7 billion) pointed to several ministers in the current ruling party, but none have faced legal proceedings.