Chad has declared a state of emergency after Boko Haram attacks in the Lake Chad region.
At least two people were killed in a suspected Boko Haram suicide bomb attack.
Ministers say sweeping powers to control people’s movements are needed because the area, which borders Nigeria, is targeted by Boko Haram.
Chad has been instrumental in helping Nigeria retake most of the areas Boko Haram had seized in northern Nigeria.
In the last few months, the militant group has intensified attacks in remote areas around Lake Chad.
The state of emergency will give the governor of the region the authority to ban the movement of people and vehicles, search homes and recover arms, the government announced following an extraordinary cabinet meeting.
Aside from Chad, Boko Haram attacks have spread from north-eastern Nigeria, its traditional stronghold, to the neighboring countries of Niger and Cameroon.
Chad is also host to a new regional force set up to tackle the Nigeria-based militant Islamists.
Benin, Cameroon, Chad, Niger and Nigeria agreed to establish the 8,700-strong force, but it has yet to start operations in earnest because of reported funding difficulties.
According to Amnesty International, at least 17,000 people, mostly civilians, have been killed since 2009, when Boko Haram launched its violent uprising to try to impose Islamist rule in northern Nigeria.