On Tuesday morning, British rock band Queen told Donald Trump to knock it off.

“An unauthorised use at the Republican Convention against our wishes,” Queen tweeted.

When Trump appeared on the main stage at the GOP convention in Cleveland on Monday night to introduce his wife Melania, he walked on to the Queen song “We Are the Champions.” Last month, Queen guitarist Brian May wrote on his website that his “personal reaction to Donald Trump using our music … We’d never give permission.”

“I can confirm that permission to use [“We Are the Champions at campaign events] was neither sought nor given,” May wrote. “We are taking advice on what steps we can take to ensure this use does not continue. Regardless of our views on Mr Trump’s platform, it has always been against our policy to allow Queen music to be used as a political campaigning tool.”

A rep for Queen did not immediately respond to a request for comment regarding whether or not the band will be taking further legal action.

—Asawin Suebsaeng