Four officials have been arrested in connection with a foiled attempt to overthrow the government of Chad, the country’s state prosecutor announced Thursday. The government has released few details of the alleged plot, saying only that the men — two generals and two lawmakers — were found with incriminating documents outlining their plans. President Idriss Déby, who has been in power since 1990, has faced numerous armed rebellions and countless attempted coups during his 23-year rule. Chad’s troops have been working with France to oust militants linked to Al Qaeda in neighboring Mali.