Boko Haram militants killed at least 10 Chadian soldiers in an attack on a military unit in Lake Chad province near the Nigerian border on Tuesday, Chad's government said in a statement.
The unit had been dispatched as a precursor to setting up an army post on the island of Bouka-Toullorom, between the villages of Ngouboua and Kaiga, where Boko Haram has carried out several offensives in recent years.
Militants attacked early on Tuesday morning, killing around 10 men and wounding several others, the statement said.