Police on Tuesday arrested 28 suspects in an operation that targeted the Naples mafia's drugs racket in the city's western Pianura suburb.
Suspects held include bosses and members of the Naples mafia or Camorra's rival Pesce-Marfella and Mele clans which operate in Pianura, police said.
The suspects face charges including mafia association, murder, extortion, drugs pushing, illegal arms possession and receiving stolen goods, according to police.
The arrests were carried out in Pianura on the orders of Naples anti-mafia prosecutors, said police.
Police also said they seized an unspecified sum of cash during the operation.
Tuesday's operation followed a probe during which police said they identified the killers of slain Mele clan member Luigi Aversano, who was murdered on 7 August 2013, allegedly by the Pesce-Marfella clan.