David Gill

David Gill, the Manchester United chief executive, has spoken of his dismay after his house was vandalised by supporters protesting about his alliance with Malcolm Glazer's family. "Judas Gill" was among the slogans daubed in red paint and Gill's anger was exacerbated last night when he discovered that the perpetrators had also targeted AIG, the club's main sponsor.

The latest attack, which occurred on Monday night while United were playing Al Hilal in a mid-season friendly in Saudi Arabia, took place at the AIG offices in Deansgate, Manchester. Gill's house in Bowdon, Greater Manchester, was targeted last week - and, worryingly for United, there have been warnings of more attacks to come.

"It's the first time I've been affected in this particular way," said Gill. "I wouldn't say I was shaken, but you do think about your family, and it isn't nice. I've been clear all along that there will always be people who are opposed to the takeover of the club. They will never change, they have been consistent in their views and concerns and will continue to express them, but it's a question of how they express them. There is way of doing things in the right manner without resorting to criminality."

AIG was targeted after angering some United fans by advertising its logo on a large banner of the Busby Babes that has been erected outside Old Trafford to commemorate the 50th anniversary of the Munich air disaster on February 6. The reasons for Gill being targeted, however, are more complex, with many fans feeling let down by the manner in which he abandoned their attempt to fight the Glazers' takeover. Gill had initially been outspoken in his opposition but then aligned himself to the Americans when it became obvious they had the financial muscle to move into power, and he has subsequently criticised the protesters he once supported.

"I don't think anyone could assume all this had gone away because if you were interviewing these people today they would be as adamant now, and as clear in their views, as they were back then," Gill said. "They will always have their views and be very dogmatic about it. We're not going to prove these people wrong because they will always believe they are right."

The police are investigating the attack on Gill's property, which occurred while nobody was there. "You just get on with it," he continued. "It is what it is. You get on with your life. It's not nice for the family. It's not dignified, but it is what it is, we have cleared it up and moved on."

He is dismayed, however, that newspapers were tipped off about the paint attacks within hours. "It's bizarre," said Gill. "But you will have to ask the people who did it because it's not the world in which I operate. It's clearly been done for a reason. We cleaned up the walls pretty quickly but I suppose they have not achieved their purpose unless they get some publicity. We move on - it's more of a concern for my family, really."