Italian footballers Tonali and Zaniolo leave national team amid betting investigation
- Newcastle's Tonali and Aston Villa's Zaniolo were sent back from Italy's training camp after police questioning.
- The two, along with Juventus' Fagioli, are under investigation for alleged illegal online betting activities.
- Italian football regulations forbid betting on soccer matches and can result in multi-year bans.
- Italy manager Spalletti defended the decision to release Tonali and Zaniolo back to their clubs.
- The investigation details remain unspecified, but Tonali and Zaniolo's unavailability prompted their release.