Man held in Italy jail for 18 years killed in Somalia blast
President Ismail Omar Guelleh, who was returning from a meeting in Ethiopia, had left the airport shortly before the shooting took place on Monday afternoon, they said.
The Republic Guard said in a statement that one of its soldiers had "suddenly opened fire" injuring two people, including a Republican Guard doctor.
It gave no motive for the attack but said an investigation had been launched. There was no immediate suggestion of a political motive for the shooting.
A spokesman for the Guard said three people had been injured in the incident. He said the doctor was the president
No group has claimed responsibility for his murder, but such incidents bear all the hallmarks of past attacks in Somalia by Al-Shabaab militants.