Angry Newcastle United supporters have attacked Kieron Dyer's car and house after the midfielder made it clear he wants to leave the club.

The England international was booed when he appeared as a substitute in Sunday's friendly win over Juventus, and fans then verbally abused Dyer and banged on the windows of his car as he left the ground after the match.

Eggs were also thrown at Dyer's house on the outskirts of Newcastle, causing Chris Mort, the club chairman, to denounce the fans' behaviour.

"We have to make all our current players and potential new signings see Newcastle as a great place to live," Mort said. "It would be disastrous for this sort of behaviour to be repeated."

Dyer wants to leave the club to be closer to his children, who live in Ipswich, and West Ham United and Tottenham Hotspur have expressed interested in signing him.

However, Sam Allardyce, the Newcastle manager, has warned West Ham he will not sell Dyer in a cut-price deal, after the Hammers were reported to have made a £4 million bid.

"Four million pounds is too low in today's prices," Allardyce said. "In today's market, for a player like Kieron Dyer who is 27 years old, a top, top player in the Premier League and an England international. It's a gross under valuation by West Ham."

If Dyer moves to West Ham he will be reunited with former Newcastle teammate Lee Bowyer. The pair were sent off for fighting each other during a match against Aston Villa in 2005.