Reports in Africa and England claim that Manchester City are set to tie up a deal for the 17-year-old, who was recently named the star player at the Under-17 World Cup, which Nigeria won.
Iheanacho has been training with Nigeria's senior squad as they prepare for the African Nations Championship to be played early next year which is predominately for players playing in Africa.
Iheanacho has been linked with a host of Europe's top clubs, but it is claimed that he is destined for City.
"Initially a young man came declaring that he was the agent of Iheanacho, but I declined to deal with him until I heard from the family because the boy is still a minor," Keshi is quoted by the Nigerian Guardian.
"It was soon after my rejection that I got a call from his father who told me that they have got a travelling visa to the United Kingdom and that I should oblige him with his son's release.
"I did and told the young man to go and do the nation proud at whichever club he finally chooses to settle down with.
"We have to be cautious not to push the players too hard so that nobody will break down."