Sheffield United have joined the list of clubs monitoring Brentford midfielder Frank Onyeka.

The Sky Bet Championship side are looking to bolster their squad for the second half of the season.

The Blades have formally made inquiries regarding Onyeka, according to reports.

Brentford are open to a loan deal with an 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 outfit Valencia and spent last season on loan at Bundesliga side Augsburg.