Other deaths occurred in Gros Morne, a community in the Artibonite region, according to Eddy Jackson Alexis, the secretary of state for communications.
President Jovenel Moïse also tweeted that civil protection workers are already working to assist people in affected areas.
The US Geological Survey said the quake hit at 8:11 p.m. Saturday night (001 GMT) and was centred 12 miles (19 kilometres) northwest of Port-de-Paix, which is about 136 miles (219 kilometres) from the capital of Port-au-Prince.
An quake hit northern Haiti late on Saturday, killing at least 14 people, injuring more than 100 and sparking a scramble by rescue agencies to help towns in the impoverished Caribbean country battered by the shockwave.
Authorities said more than 100 people were also injured when several buildings collapsed.
The quake's center was located about 12 miles west-northwest of Ti Port-de-Paix and struck with a depth of about 9.5 miles.
"The injured are being treated at area hospitals", Haiti's civil protection agency said on October 6, AFP reported, adding that injuries were sustained after people panicked.
Haiti's civil protection agency said two minor aftershocks were registered, adding that no tsunami warning was issued in connection with the quake activity.
The quake was felt in the Haitian capital as well as in neighbouring Dominican Republic.
The agency said: "The shock was felt across all departments of the country, giving rise to panic in several towns".
The area hit by Saturday's quake, the Nord-Ouest department, is the poorest part of what is a highly impoverished country.
Pierre Jacques Baudre, a farmer and father of seven, said he was afraid to return to his home after one wall built with rocks and cement crumbled.
In 2010, a magnitude 7.1 tremor killed more than 250,000 people in Haiti.
Tens of thousands of people are still believed to be displaced as a result.