Senior staff told the 58-year-old musician he wouldn’t be allowed to board the plane unless he cooperated and let security search his bag, according to the Daily Mirror.

Gibb refused and clutched his bag to his chest. He was eventually escorted back through the security checkpoints, missing his 10:45 a.m. flight.

“It was all very odd. No one could understand what his problem was,” an airport source said, according to the British tabloid. “He was fairly calm and not ranting. He just seemed annoyed at being singled out.”