ABN TV gathered that the men dressed in black regalia numbered about 20, wielding dangerous weapons.
The sergeant whose name was given as Okezie and hailed from Umuahia, the state capital was said to be on night patrol with some of his colleagues when they were attacked by the hoodlums at the Uratta Junction along the Enugu/Port Harcourt Expressway.
The policemen were said to be operating in a Toyota Sienna Sport Utility Vehicle (SUV) when on approaching the Uratta Junction, the gunmen attacked them.
The cops who were taken unawares by their attackers were said to have jumped out from the vehicle and ran in different directions to escape from the bullets of the gunmen.
However, the men of the underworld were reported to have pursued Sergeant Okezie to the premises of a nearby hotel and shot him dead.
After killing the policeman, the gunmen made away with his AK-47 rifle.
While confirming the incident, the Police Public Relations Officer, Godfrey Ogbonna told our correspondent that a delegation led by the Commissioner of Police, CP Janet Agbede has been dispatched for an on-the-spot assessment.