President Idris Mahamat Déby orders the military to be on high alert and a "total closure" of the border.
The conflict has persisted despite a peace deal signed by DR Congo and Rwanda in December.
Caf executive committee member Augustin Senghor says the decision to strip Senegal of the 2025 Afcon title is "unacceptable, abject and we have to denounce it".
The conflict has persisted despite a peace deal signed by DR Congo and Rwanda in December.
Residents of some areas have been without mains water for weeks.
Residents of some areas have been without mains water for weeks.
Residents of some areas have been without mains water for weeks.
The Senegalese government calls for an "independent international investigation" at the Confederation of African Football after it stripped Senegal of the Africa Cup of Nations title.
The return of southern white rhinos to the country comes after Ugandan poachers once wiped them out.
Hunting for the horns and meat, Ugandan poachers once wiped out the southern white rhinos from the country.