A group of rebels attacked a Chadian border post in the north of the country as polling stations began counting votes from the weekend presidential election.
Government spokesman Chérif Mahamat Zene said in a statement that a group of heavily armed vehicles crossed the border from Libya and attacked the border post at Zouarké at around 6 p.m. (1700 GMT) on Sunday.
Mahamat said the rebels were on the run and being pursued by the air force, without providing further details of the clashes.
The Front for Change and Concord in Chad (FACT), a political-military group founded by dissident army officers in 2016, claimed responsibility for the attack, calling Sunday’s election a masquerade,
President Idriss Deby sought to extend his 30-year-rule over the central African country in an election boycotted by several opposition groups.
FACT, like opposition politicians and rights groups in Chad, accuse President Deby of repression surrounding the election.
Results have not yet been announced.
The army said on Monday that “steps had been taken to neutralise” the incursion at Zouarké, about 1,000km (620 miles) north of the capital N’Djamena.