Police have disarmed a half-naked man with a hatchet who boarded a Translink bus in north Belfast.
The man, wearing jeans but bare-chested, went to the upper deck of the vehicle at about 0730 BST and began wielding the hatchet.
Linda Shannon of Translink said frightened passengers told the driver.
"He called for the back-up of the PSNI and they reacted very quickly," she said. A man was arrested and no one was injured.