Hoops’ boss Tony Mowbray chose to leave Keane and Aiden McGeady on the bench for the trip to East End Park and it almost backfired during an exciting first half.

After Diomansy Kamara opened the scoring for the visitors, David Graham’s strike and Andy Kirk’s penalty put the home side ahead before Hoops’ striker Morten Rasmussen gratefully levelled two minutes from the interval.

But when Keane came on for Marc Crosas at the start of the second half, Celtic strode away.

The Fifers’ resistance crumbled in the second half after defender Callum Woods scored an own goal under pressure from Rasmussen, then Keane scored from the spot with his first goal for the club to ensure a safe passage into the next round.