A gang seeking to overthrow Haitian Prime Minister Ariel Henry set fire to a police station in the capital, Port-au-Prince.
A police station in the busy Salomon open-air market was recently targeted, according to local media.
As Mr Henry headed to a regional summit last week, gangs in the city hit by violence stepped up their attacks.
The riots paralyzed air traffic and prevented his return home.
Mr Henry attempted to fly back to Port-au-Prince on Tuesday but instead ended up in the U.S. territory of Puerto Rico.
He was unable to land in the Haitian capital because the international airport was closed after soldiers repelled an attempt by armed groups to take control of it.
Civil aviation authorities in the neighbouring Dominican Republic also refused to fly the prime minister’s plane, saying the necessary flight plan had not been provided.
Mr Henry has not spoken publicly since a visit to Kenya in which he tried to salvage a deal with the African country where he is leading a multinational force to help restore order in Haiti.
The capital’s gangs took advantage of his absence to launch a series of coordinated attacks.
How the gangs came to rule Haiti
Their targets include the airport, which they want to control to prevent Mr Henry from returning home, and thousands of people. It included two prisons that released prisoners.
They also torched the peace court in Croix-des-Bouquets and looted and torched more than 20 other buildings, according to a tally by the National Network for the Defense of Human Rights (RNDDH).
At least six police officers were killed and the police academy was destroyed.
After the attack on the national prison, the bodies of several prisoners were found lying on the street.
Violence has exacerbated Haiti’s humanitarian crisis.