Protesters in civilian clothes who identified themselves as police first attacked Prime Minister Ariel Henry's official residence, according to a Reuters witness, and then flooded the airport as Henry was arriving from a trip to Argentina.

Henry was temporarily stuck in the airport, but returned to his residence in Port-au-Prince later on Thursday, followed by police protesters. A Reuters witness heard heavy gunfire near his home.

Haiti's National Police and the Prime Minister's Office did not immediately respond to requests for comment.

Roads around Port-au-Prince and in several cities to the north were blocked by protesters.

A group of U.S. government officials were visiting Haiti at the time, and a U.S. State Department spokesperson said all Washington's personnel were accounted for and they had moved some meetings as a precaution.

Haitian human rights group RNDDH said in a statement that 78 police officers had been killed since Henry came to power in July 2021, averaging five each month, saying the prime minister and the head of the national police Frantz Elbe were "responsible for each of the 78 lives lost during their reign."

"History will remember they did nothing to protect and preserve the lives of these agents who chose to serve their country," it added.

Late on Thursday, The Bahamas' foreign ministry said the country's prime minister had ordered all Bahamians, including its diplomatic personnel, to leave Haiti as soon as security conditions permit.

Haitian police had earlier in the day stopped the neighboring country's local charge d'affaires and taken their vehicle and weapons, it added, saying all its diplomats were safe, as well as five citizens who had been trapped around the airport.

Last week, four police officers near the capital were killed by the Vitelhomme gang, while shootouts on Wednesday with the Savien gang in the town of Liancourt left another seven officers dead, according to Haiti's National Police and local media reports.

U.S. Assistant Secretary of State Brian Nichols expressed condolences to the families of police officers killed in the latest violence, and said the United States would continue to "impose costs on those responsible for this heinous violence."

Asked how the developments could affect efforts to craft an international armed intervention, the U.S. State Department spokesperson told Reuters the United States was still working with international partners to develop "a framework" for a security mission to "provide security and stability."

The United Nations is discussing sending a foreign strike force to confront the criminal groups. The proposal was originally made three months ago but no country has offered to lead such a force.