Herbert Wigwe, the Group CEO of Access Holdings Plc, presumed dead.
According to The Will, Wigwe died in a helicopter crash in California near the Nevada border in the United States.
There are also claims that his wife and son were on the ill-fated helicopter.
According to the New York Times, investigators had not found any survivors as of Saturday morning.
According to the Federal Aviation Administration, the Eurocopter EC130 helicopter crashed around 10 p.m. local time near Nipton, Calif., an unincorporated village 60 miles south of Las Vegas in eastern San Bernardino County.
It is unknown where the helicopter had departed and where it was headed.