At least 25 people were killed and 44 injured on Friday in a bus accident in Algeria, according to a provisional report from the Algerian Civil Protection.The bus, which was carrying passengers from Sétif to the Algerian capital, skidded in the locality of El Karma, about 50 kilometers (30 miles) from Algiers, before plunging into a deep ravine.Rescue teams were working at the scene, with a constant flow of ambulances transporting the injured to the nearest hospitals.Algerian President Abdelmadjid Tebboune has declared three days of national mourning, according to state television.