The 24-year-old striker, who has netted four times in the Championship this campaign, is out of contract at the end of the season and the Swans are eager to secure a cut-price deal
The 24-year-old French striker, whose contract expires at the end of the season, emerged as a potential transfer target for Michael Laudrup earlier this week and now looks to be a step closer to making a move to south Wales.
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"Swansea enquired last night (Wednesday) about David N'Gog's availability," he said. "As we speak right now the two chairmen are talking to see what they can do or what they would like to do.
"David N'Gog is aware of it and he's also having a look at his position. There's six months to go left on his contract.
"I'm in a difficult position; it's very hard to stop a young player going to the Premier League and it's very hard to stop a player with six months left on his contract.
"I'd like to think every player has the desire to play in the Premier League. It's going to be very difficult to think he would be here on the Monday morning."
N'Gog, who joined Bolton from Liverpool in 2011, has scored four goals in 19 appearances for the Championship outfit this season.