Chad prolongs state of emergency for 15 days

N'DJAMENA (Reuters) - Chad's national assembly authorized President Idriss Deby's government on Friday to extend by 15 days a state of emergency declared following a rebel attack on the capital N'Djamena in early February.

Deby had assumed exceptional powers for his government on February 14 to tighten security across the landlocked central African country after the rebel assault, in which at least 400 civilians were killed.

(Reporting by Moumine Ngarmbassa; Editing by Pascal Fletcher)