A group of gunmen killed three police escorts and kidnapped the manager of a Nigerian oil company in Port Harcourt Rivers State. Dressed in military uniforms, the attackers ambushed and fired on the convoy of a senior oil executive in the Rumuokoro area of Port Harcourt. “Three policemen escorting the executive were killed while the man was kidnapped and taken to an unknown location,” Rivers State police spokeswoman Grace Iringe-Koko told AFP. The gunmen, posing as a military patrol in a green car, signaled the convoy to stop before opening fire and killing the policemen, she said. The police said the kidnapped man is the director of IGPES Group, a Nigerian oil and gas company based in Port Harcourt. An investigation is underway, Iringe-Koko said.