Halifax police are looking for a man who brandished a gun while riding a city bus in Dartmouth early Tuesday morning.

Police were called to the scene on a Metro Transit bus at 1:36 a.m.

They were told that a man and woman were arguing with four younger women, when the man pulled a handgun out and pointed it at two of the women. Then the woman who was with the man punched one of the women in the face as she stepped off the bus.

Police released descriptions of the man and woman.

They are looking for a white man, 26 years old, with a slim build, standing about 5'8". He was wearing a black jacket with white trim and a blue toque.

Police are also looking for a white woman with long black hair. She was wearing a black coat and a grey sweater.