An alleged Mafia chief's appetite for pizza has cost him his freedom.

Roberto Manganiello, 35, an alleged boss in Naples' Camorra in southern Italy, has been arrested by detectives disguised as pizza boys who delivered food to his home as he was watching a football match.

Manganiello, one of Italy's most-wanted crime bosses, had been on the run since 2013. He has been sought for two killings in 2004 that launched a clan feud. Police said he also ran a drug and extortion ring.

It was reported by Germany's Deutsche Welle that the investigation included at least 50 people working in a team tracking his movements.