They include presidents Paul Kagame of Rwanda, Omar Hassan al-Bashir of Sudan and Mahamadou Issoufou of Niger.
Senegal will be represented by its Prime Minister Mohammed Dionne, France by its Defense Minister Jean-Yves Le Drian while the U.S. will be represented by its interim Deputy Secretary of State for African Affairs David Boris Whaton.
China, which is one of the key partners of Chad, will send its Justice Minister Wu Aiying.
Fifteen other countries will be represented at ministerial level, while regional and international organizations such as the African Union will also be represented.
Deby Itno, 64, who has been in power for over 25 years, will on Monday begin a new 5-year term. On April 10, 2016, he won the presidential elections that were strongly contested by the opposition. Enditem