Amnesty international has withdrawn its most prestigious human rights prize from Aung San Suu Kyi, accusing the Myanmar leader of perpetuating human rights abuses by not speaking out about violence against the Rohingya Muslim minority.

Once hailed as a champion in the fight for democracy, Suu Kyi has been stripped of a series of international honors over a Rohingya exodus that began in august 2017.

The international human rights group named Suu Kyi as its 2009 ambassador of conscience award recipient when she was still under house arrest for her opposition to Myanmar’s oppressive military junta.

Amnesty international said in a statement she had failed to speak out and had “shielded the security forces from accountability” for the violence against the Rohingya, calling it a “shameful betrayal of the values she once stood for”.