The match was played at the Godswill Akpabio International Stadium in Uyo, the Akwa Ibom state capital.
Ighalo, who plies his trade with Chinese club Changchun Yatai, grabbed the first goal from the penalty spot after a blunder from Libya goalkeeper in the second minute.
At the 58th minute, Punch reports that Arsenal’s midfielder Alex Iwobi delivered a lovely weighted pass to Ighalo who maintained his composure to dibble the goalkeeper and score his second goal for Nigeria. He completed his hattrick 10 minutes later after latching onto a cross from Ahmed Musa and in the ensuing scramble played the ball past Libyan defenders and the keeper.
Samuel Kalu rounded up the Super Eagles victory at the 91st minute.
The Super Eagles are second on the table with six points from three marches behind leaders South Africa who are on seven points.
Posted by Juliet Ekwebelam