Celtic are reportedly among a host of clubs interested in signing former Colchester United defender Magnus Okuonghae.
The 26-year-old Nigerian centre-back is available on a free transfer after his three-year deal with the League One side was not renewed.
Championship trio Blackburn Rovers, Bolton Wanderers and Charlton Athletic are also believed to be keen on Okuonghae's signature, according to The Sun.
Okuonghae made exactly 100 league appearances during his time at Colchester.