No official statements in English could be found, or comments from official government sites. Nevertheless, it was reported that Chad condemned the attacks in “Widespread Condemnation of Attacks in the United States” (IRNA) http://allafrica.com/stories/200109170072.html and “All Sub-Saharan Africa Said Supporting Anti-Terror Coalition” (allAfrica.com) http://allafrica.com/stories/200109180330.html
Later Additions:
Deby shocked by terrorist attacks on US (PANA, 9/13/01)
http://www.panapress.com/newslat.asp?code=eng016291&dte=13/09/2001
Chad, US sign two agreements on national mediation (PANA, 9/27/01)
http://www.panapress.com/newslat.asp?code=eng017881&dte=27/09/2001