U.K. rock band Oasis has been forced to postpone tonight's (Sept. 9) gig at the Canadian venue John Labatt Centre in London, Ontario, after guitarist/songwriter Noel Gallagher was attacked by a stage invader two days ago at the Virgin Festival in Toronto.

The show will now take place on Dec. 15. Ticketholders are asked to hold on to their tickets, which will be valid for the new date. And those unable to attend can collect refunds at the original point of purchase.