United Nations sources confirmed the two men were international consultants with the United Nations Office on Drugs and Crime (UNODC). Britain's Foreign Office confirmed one was a Briton, and sources identified the second victim as a Frenchman.
"Two white men have been shot inside the airport as they got off a plane," local security official Mohamed Mire said. An airport official said the attacker was dressed in a police uniform.
"One of them died inside the airport and the other one was rushed to hospital where he later died of the injuries. Both of them were white men," said witness Hassan Ahmed.
Galkayo is situated 575 kilometres north of the capital Mogadishu and lies on the border with the northern breakaway state of Puntland. UN security in Galkayo, which is outside of effective central government control, is normally extremely tight.
Also Read
The two men had reportedly flown into Galkayo to meet with Somali officials on the issue of regulating the money transfer services that replace a formal banking system in Somalia.