U2 will perform four dates at the Ziggo Dome near Amsterdam next September but questions are being asked about how much of the special VIP tickets will go to charity.

Fans who want to be as close to the band as possible are being given the chance to buy €265 tickets for the ‘Red Zone’ and ‘some of the money’ will go to combat Aids and Hiv in developing countries.

However, the Volkskrant reports that efforts to find out what proportion of the ticket price will go to charity have drawn a blank.

The Ziggo Dome company and concert organiser Mojo don’t know and referred inquiries to the band.

The band’s record label Island Records put questions through to a recording machine. Principle Management in Dublin and parent company Live Nation did not know either, while Universal Music Group, which owns Island Records, referred inquiries back to Mojo.

U2 have previously come under fire for basing themselves in Amsterdam for tax purposes. Royalties are not taxed in the Netherlands.