Fourteen people on a small jet died when the plane crashed in Brazil's northern Amazonas state on Saturday, the state's governor said.
The accident took place in the Barcelos province, some 400 km from the state capital, Manaus.
"I deeply regret the death of the 12 passengers and two crew members who were victims of the plane crash in Barcelos on Saturday," said Wilson Lima, Governor of Amazonas state on X.
"Our teams have been working from the outset to provide the necessary support. My sympathy and prayers go out to their families and friends."
The Manaus Aerotaxi airline issued a statement confirming there had been an accident and that it was investigating but offering no details about deaths or injuries.
"We count on respect for the privacy of those involved at this difficult time and will be available to provide all necessary information and updates as the investigation progresses," the statement said.
The Brazilian Air Force (FAB) said in a statement that investigators from the Accident Investigation and Prevention Center (CENIPA) had been called in to find out what caused the crash of the small aircraft, an Embraer Bandeirante with the registration PT-SOG.
In an interview with O Globo newspaper, Governor Lima said the bodies had already been removed from the aircraft and the victims were Brazilian tourists.
Lima also added that the region faces heavy rainfall and the most likely cause of the accident was an error in the route taken at the time of landing.