New manager Mark Hughes has identified his defence as an area in which he needs re-enforcements, and talks with both players are believed to be at an advanced stage.
Hughes knows Onuoha well from his time managing Manchester City, and has admitted that negotiations are underway regarding a transfer.
“We’ve obviously expressed an interest and I think it is progressing,” the coach told Sky Sports.
“I don’t think we are at a point where we can confirm or really say it will definitely happen. We’re hopeful but it has not been confirmed yet.
“There has been conversations between both clubs and if we can make it happen we will be delighted.
“I am not sure if we have totally been given permission to speak to the boy but certainly the two clubs are talking. Faxes are going back and forth, emails and what have you.
“I would like to think at some point today I’ll be able to speak to him directly and make him understand what we want to do here,” he stated.
Meanwhile, Nigeria international Taiwo has had limited opportunities with AC Milan since joining the Italian giants in the summer from Marseille.
It is believed that a fee has been agreed upon, and personal terms are now the only obstacle to the left back joining the Loftus Road club.
By Gareth McKnight