Human rights groups voiced outrage Wednesday after Italy released a Libyan warlord on a technicality, after he was arrested on a warrant from the International Criminal Court accusing him of war crimes and crimes against humanity.

ROME (AP) — Italian police arrested a Libyan warlord on a warrant from the International Criminal Court, but an Italian tribunal refused to approve the arrest and he was instead sent back to Libya, Italy's state-run RAI television reported.

Al-Masri had been arrested Sunday in Turin, where he reportedly had attended the Juventus-Milan soccer match the night before. The ICC warrant, dated the day before, accused al-Masri of war crimes and crimes against humanity committed in the Mitiga prison in Libya starting in 2015 that are punishable with life in prison.