Sky Sports understands that Millwall have made a bid to sign striker Simon Church from Reading.
Kenny Jackett is looking to improve his attacking options to help the Lions push on during the second half of the season and challenge for promotion from the Championship.
Chris Wood has been a key player for Millwall during a loan spell from West Bromwich Albion but has since joined Leicester City, leaving Jackett to look elsewhere.
Church has been identified as a target and it is understood that an offer has been made to bring him in from Reading.
The 24-year-old, who has recently had a spell on loan with Huddersfield Town, has been with Reading since the start of his career but is out of contract in the summer.