Athletic Bilbao have turned down a €30m (£25m) bid from Manchester United for their 24-year-old midfielder Ander Herrera.

Meanwhile the Italian newspaper Corriere della Sera is reporting that United have offered €12m (£10m) for the Roma midfifelder Daniele De Rossi, a target for Manchester City under Roberto Mancini.

The Bilbao club president, Josu Urrutia, said in a press conference on Friday that was reported on Bilbao's Twitter feed: "We have had an offer for Ander Herrera. Our club is different, it is based on sentiment. Our objective isn't to make money.

"We received the offer last night and have communicated that we will not negotiate for our players. For a player to go, first the player must express his desire to leave the club and pay the release clause."

The Basque-born playmaker started his career with Real Zaragoza, before joining his hometown club Bilbao in 2011, where his performances have caught the attention of United, who failed in moves this summer for his fellow Spaniards Thiago Alcântara and Cesc Fábregas.

The United manager, David Moyes, continues to be frustrated in his attempts to sign Marouane Fellaini from his old club Everton, along with Leighton Baines, and had a joint bid of £36m for the pair turned down on Thursday. Moyes may feel Herrera is a more realistic target.

Herrera's contract with Bilbao expires in 2016 but it contains a release clause of €36m (£31m), which United may have to meet if they are to prise the player from the Spanish club.

Moyes would not be drawn on his transfer targets on Friday. "I don't think there's anything else to add," he said in his press conference before Sunday's match at Liverpool.

"I wouldn't disclose any names, just let the clubs deal with it and we'll try and do it in a professional manner," Moyes said when asked specifically about Herrera.

He added: "I don't know how busy it's going to be but it's a busy football market. It might be busy in the next few days and I hope we do a little bit of business but I couldn't guarantee that."