A suspicious package at Celtic Park is believed to have contained a bullet and was addressed to Hoops manager Neil Lennon.

Hearts face serious questions from the Scottish Premier League over how a supporter was able to breach security and reach Celtic manager Neil Lennon in his technical area at Tynecastle.

Scottish football authorities today began an investigation into events at Tynecastle last night after Celtic manager Neil Lennon was attacked by a fan during his side’s 3-0 win in the Clydesdale Bank Premier League.