There's an eye in the sky over Bill Cosby, and Pennsylvania P/rison officials are p/issed about it ... TMZ has learned. Cosby got an uninvited visitor last week when a drone was flown over his home away from home -- State C/orrectional I/nstitute Phoenix.
Sources familiar with the situation tell TMZ ... the drone made the pass while Cosby was being escorted around the yard. He gets an escort due to his blindness. We're told p/rison s/ecurity measures detected the drone and S C I Phoenix was immediately placed under lockdown for a full day. P/rison officials believe a media outlet sent the drone to get a sh/ot of 81-year-old Cosby ... who's doing 3 to 10 years for se/xual a/ssault.
It's unclear if the mission was a success. Our sources say Cosby's a/ttorneys were notified of the breach. For the record, all Pennsylvania p/risons got drone detection systems last year as part of sweeping se/curity upgrades. The state's Dept. of C/orrections tells us they don't discuss sec/urity matters.