Neil Lennon accused Celtic of conceding "crazy, suicidal" goals against CFR Cluj as they suffered a shock Champions League qualifying defeat.
The Scottish champions were beaten 4-3 in Glasgow on Tuesday to lose the tie 5-4 on aggregate and miss out on a play-off match against Slavia Prague.
Celtic were 1-0 down at half-time but moved 2-1 up through James Forrest and Odsonne Edouard, only for Abdel Billel Omrani to level the scores from the penalty spot.
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The hosts hit back through Ryan Christie but Omrani struck again to make it 3-3 before George Tucudean made Cluj's passage to the next round secure with the last kick of the game.