United Kingdom, Sept. 20 -- Damon Albarn has urged fans to "never be neutral" as he held a Palestinian flag aloft during a Gorillaz concert, amid the growing row surrounding Ed Sheeran's Loop tour and the removal of Macklemore from its line-up.

The Blur frontman, 58, made the declaration as Gorillaz opened the North American leg of their The Mountain tour at the Kia Center in Orlando, Florida, with his intervention coming days after Macklemore, 43, said he had been removed from Ed's US tour following his pro-Palestinian remarks during an earlier support slot, prompting several other musicians to withdraw from forthcoming shows.

Taking a Palestinian flag from a member of the audience, Damon told the crowd: "Don't forget this. Ever. Stand...