Former Canadian prime ministers Stephen Harper and Kim Campbell are among more than 100 world leaders who’ve signed a letter calling for democratic reform in Iran and efforts to hold “regime officials accountable.”

The letter, sent to Canadian Prime Minister Justin Trudeau, British Prime Minister Rishi Sunak, US President Joe Biden, and European Council President Charles Michel, was signed by 109 former heads of government and state, including former British prime minister Liz Truss and former American vice-president Mike Pence.