Two employees from oil company Shell have been kidnapped in Nigeria.
The staff members were returning from a business trip, when their vehicle was attacked on a road in Rivers state in the Delta region.
Police escorting the workers were killed in the attack.
Efforts are underway to locate them.

Two injured after fallen drone debris hits houses in Saudi Arabia
China confirms three ships passed through Strait of Hormuz
Three UN peacekeepers killed in Lebanon as Israeli strikes pummel south
Russian attacks kill two, injure dozens
Iran calls US peace proposals 'unrealistic', Trump issues new warning to Tehran