ROME (AP) — Italian police have arrested 29 airport baggage handlers accused of stealing cameras, cellphones and other loot from passengers’ luggage, a bust made possible after hidden cameras were installed in airplane cargo holds where the thefts occurred.

Italian national carrier Alitalia said Friday it cooperated with police at Rome’s Leonardo da Vinci airport and in Lamezia Terme, in the “toe” of boot-shaped Italy, where the investigation began in 2011 and spread to a half-dozen airports across the country.