He revised the official death toll up to 110 people, including 11 foreigners.
Three women survived the crash, but are said to be in a critical condition with serious burns.
The incident is Cuba’s worst air disaster in decades, and two days of national mourning began on Saturday.
Officials said investigators are combing through the wreckage of the plane, a Boeing 737 which was nearly 40 years old, at the field where it crashed some 20km (12 miles) south of the Cuban capital.
The black box which has already been recovered will hold key flight data and information about what happened to the plane.