Ipswich have accepted bids for Jonathan Stead, Alex Bruce and Owen Garvan.
Striker Stead is wanted by more than one club - one of which is Premier League newcomer Blackpool, defender Bruce is in talks with fellow Championship side Leeds while midfielder Garvan could be on his way to Crystal Palace.
Manager Roy Keane told Town's official website: "A fee has been accepted for all three and we have given them permission to talk to the clubs; it's up to the players now to agree a deal."
Keane also revealed he will know within the next 48 hours whether talks with Sunderland goalkeeper Marton Fulop have been successful. The Hungary international spent the end of last season on loan at Manchester City.
Keane added: "I want to bring in another keeper and we've been talking to Marton. I think he wants to come but there are things to sort out and he is one of two targets we have."
Elsewhere, winger Luciano Civelli has been told he faces just 10 days on the sidelines nursing a jarred knee while Town saw off Bury 1-0 in their latest pre-season friendly on Wednesday night, Gareth McAuley heading the winner.
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