Sheffield United have joined the list of clubs interested in Brentford midfielder, Frank Onyeka, DAILY POST reports.
The Sky Bet Championship club are keen to strengthen their squad for the second half of the season.
The Blades have formally enquired about Onyeka, according to the Daily Mail.
Brentford would consider a loan with option to buy for the Nigeria international.
Onyeka has struggled for regular playing time at the club this season.
The 28-year-old has also been linked with Spanish club, Valencia.
He spent last season on loan with Bundesliga side, Augsburg.
