Celtic have made a loan offer for West Ham winger Robert Snodgrass.
Sky Sports News understands the bid was made late on Saturday night for the 33-year-old.
Celtic's priority is to sign a left-back but they would also like to add a winger and centre-back if they can.
Manager Neil Lennon did not comment on Snodgrass after his side's 2-0 win at St Johnstone on Sunday.
Asked by Sky Sports if he thinks he will be busy on deadline day, Lennon said: "Yeah, either way. Obviously we want to keep everybody and get a couple players if we can, but at least one.
"You can link names at me all you like but you're not going to get a straight answer. I'll be with Peter [Lawwell] and Nick Hammond tomorrow and we'll be looking at a few things."
Snodgrass has scored two goals in three Carabao Cup appearances for West Ham so far this season but is yet to play in the Premier League this term.
He played 27 times for West Ham last season.
Transfer Deadline Day - October 5
The summer transfer window closes at 11pm on Monday, October 5 with a feast of activity throughout the day involving the biggest names in football.
Some of the highlights to enjoy on Sky Sports News and across our Sky Sports platforms:
- Breakfast with David Ginola and Rachel Yankey
- The Football Show Special with Dwight Yorke and Andy Cole
- Countdown with Harry and Jamie Redknapp
- Supporters at the heart of the show with Sky VIP fan wall
You can also follow the stories on Sky Sports' digital platforms, with our dedicated Transfer Centre blog.
Here's all you need to know about Deadline Day and how to keep across all the deals and drama with Sky Sports.