Déby was confirmed dead after sustaining injuries in battle field.
Details of his death are still sketchy.
He was reported dead on Tuesday, a day after he won re-election for a sixth term in office.
The Chadian national army has confirmed his death, saying he died from injuries sustained in a fight with rebels over the weekend.
Deby was said to be commanding his army in the battle against the rebels in the far north.
The Chadian army is currently combating rebel forces who have launched an assault on the capital, N’Djamena.
Déby has been Chad’s president for about 30 years.