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

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.

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.