He had withdrawn into Benevento to prepare for a further campaign when he was treacherously attacked in his palace, robbed and imprisoned by Adelchis, prince of Benevento, in August 871.
Ia mundur ke Benevento untuk mempersiapkan kampanye selanjutnya ketika ia diserang di dalam istananya, dirampok dan dipenjarakan oleh Adelchi, Pangeran Benevento, di bulan Agustus 871.