A Belgian man working for a building materials company has been murdered in Nigeria’s oil-producing Niger Delta, police said on Sunday, while in another city one man was killed in a street gunfight. The Belgian died of gunshot wounds on Saturday evening in Warri, in the western delta, after two gunmen ambushed him. Police arrested his Nigerian girlfriend and driver on suspicion of hiring the killers so they could keep the victim’s property. Ful l Story