A Yemeni security official says that a gunman shot and killed the French manager of Austrian oil and gas company OMV outside the capital.
The official said the attacker was believed to be a security guard at the company's compound outside San'a, but the motive was not immediately known.
The Frenchman died shortly after being transferred to a hospital for treatment, he added.
The official spoke on condition of anonymity because he was not authorized to speak to the press.
The shooting took place the same day a British diplomatic motorcade was attacked in the capital.