Jeff Lynne's ELO canceled its July 13 performance at BST Hyde Park in London. The show was billed as the group's final concert ever.

"Jeff has been battling a systemic infection and is currently in the care of a team of doctors," organizers wrote on July 12.

The cancellation brings an unexpected end to a tour that was meant to close the chapter on Lynne’s five-decade career. He had first returned to live touring with a comeback show at Hyde Park in 2014 and had described this weekend’s gig as the perfect way to say goodbye.