"Two Yemenis were kidnapped, they (police) believe. But they are not 100 percent sure. They are still missing," he said.
He blamed the incident on the Baggara tribe, an Arab nomadic group that grazes cattle in Unity State. "This is not the first time Baggara have ambushed cars," he said.
The energy-producing region between north and south Sudan has seen escalating attacks against oil workers in the last six months.
Gunmen abducted nine Chinese oil workers from South Kordofan earlier this month and later killed four after what China said was a failed rescue attempt. Three workers escaped alive and two more remain missing. Sudan says the killings were unprovoked.
Khartoum blamed the kidnapping and killing of the Chinese workers on the Darfur rebel group the Justice and Equality Movement (JEM). The group has denied any involvement.
Sudan produces around 500,000 barrels per day of crude.
Author: Jo Amey




