Neil Lennon's departure from the club outside the club's stadium.Supporters descended on Parkhead around full-time as the club fell to another defeat against Ross County, exiting the Betfred Cup in the process.Hundreds were at the gates by the time police arrived on the scene and Celtic have slammed the behaviour as they insisted some players were left "shaken" by the angst.They insist club personnel were targeted with missiles and have promised a full investigation.The statement read: "Everyone