Sir Rod Stewart has offered his "deepest apologies" after he was filmed appearing to stage a mock execution in the desert.
A video posted on social media appeared to show the singer re-enact a beheading similar those used by the so-called Islamic State.
But the 72-year-old said his actions were "misinterpreted".
Sir Rod said he and his friends were "playing out Game Of Thrones" while "larking about" before a show.
The clip has since been deleted from his wife Penny Lancaster's Instagram account.
It showed the couple with friends while on his world tour.
In a statement, the star said: "From re-enacting the Beatles' Abbey Road crossing to spontaneously playing out Game Of Thrones, we were simply larking about pre-show.
"Understandably, this has been misinterpreted and I send my deepest apologies to those who have been offended."
Sir Rod is seen in the video leading a line of friends, with Lancaster at the back, along the sand dunes.
Lancaster, 45, a model, rolls down the dunes, and then stretches out on the sand.
Behind her, the singer stands behind and appears to put his hand across the neck of a friend, who is sitting in front of him.