Boko Haram fighters killed five people during an attack on a Chadian village on Friday.
The village was attacked by 30 militants who set houses on fire in the early morning on Friday. This is the first known lethal attack by the Boko Haram in Chad, the Nigerian militant group in the country, security source said.
"They came on board three canoes and succeeded in killing about ten people before being pushed back by the army," said a resident of the village of Ngouboua on the shores of Lake Chad.
Earlier, Boko Haram staged several cross-border attacks in recent weeks as part of its campaign to establish an Islamic caliphate around the Lake Chad area which borders Nigeria, Chad, Cameroon and Niger.
Chad's army has joined a regional fight against Boko Haram and says it has killed hundreds of fighters during the last fortnight.