A Moroccan military plane hit a mountainside near Guelmim in the south of the country, killing all 80 people aboard, a hospital source said.
The army earlier said 78 people were killed and three were rushed to hospital in serious condition after the Hercules C-130 crashed on the edge of the Sahara desert in Morocco's worst military aviation disaster.
But a hospital source said two of the injured subsequently died.
A resident in the area said there was thick fog in the area at the time of the crash, which occurred at 9am (10am Irish time) some 730km south of Rabat.
'The crash, due to bad weather conditions, caused 78 deaths and (left) three seriously wounded', Morocco's Royal Armed Forces said in a statement carried on the official MAP news agency.
The MAP news agency said that the plane had been travelling from the Western Saharan city of Dakhla and was due to travel on to Kenitra, 40km north of the capital, Rabat.
Morocco keeps the majority of its soldiers in Western Sahara.
