Two suicide bombers blew themselves up outside a Chadian army camp on Wednesday, according to security sources who blamed the attack on Boko Haram, the Nigerian Islamist group that Chad and other countries in the region are pursuing militarily.
"The two kamikazes tried to get into the camp but were pushed back by the guard so they detonated themselves at the entrance," said an officer at the Kaiga Ngouboua base in the Lake Chad region, adding that a suspected accomplice had been arrested. Nobody except the bombers was killed.
Chad's capital N'Djamena will host the command centre of a 8,700-strong multinational force to fight Boko Haram, military chiefs from Nigeria, Chad, Niger, Cameroon and Benin agreed on Saturday.
Ten people are due to go on trial in N'Djamena later on Wednesday accused of involvement in a series of deadly attacks in the city in June and July.
President Idriss Deby has said that Boko Haram, whose stronghold in northeastern Nigeria lies less than 100 km (60 miles) from N'Djamena, can be defeated by the end of the year.