The Chadian leader was expected in the Cameroonian capital on Thursday.
According to reliable sources, the Christmas day attacks in Nigeria by Boko Haram which resulted in the death of about 40 people were behind the hurried meeting between the two leaders.
President Deby is expected to later fly to Niger and the Central African Republic on a mission to fine-tune a regional plan on how to combat the radical Islamist sect.
The Chadian leader had on December 19 met with Nigeria’s President Goodluck Jonathan to discuss the increase in the number of attacks by Boko Haram in areas bordering Chad.
The renewed focus on Boko Haram comes as ten Koranic schools in Logone, Chari, Mayo Sava and Diamare divisions of Cameroon’s Far North Region were reported to have been closed down by administrative authorities.
Several Koranic teachers alleged “daily” official harassment since the December 25 bombings in Nigeria.
“They have been treating all of us as if we were terrorists”, a preacher at one mosque who requested anonymity complained.