Complex sentence: The RAID and the GIGN began searching for the two suspects between Villers-Cotterêts and Crépy-en-Valois; the suspects were said to have abandoned their cars before hiding in a forest near Longpont.
Split into simpler sentences: The RAID and the GIGN are searching for the two suspects between Villers-Cotterêts and Crépy-en-Valois. The suspects are said to have abandoned their cars and are currently hiding in a forest near Longpont.