A prominent leader of Argentina's LGBT community has been found murdered in her home.

Diana Sacayan, 40, was found dead Tuesday in her Buenos Aires apartment, the BBC reported.

Two additional transgender women, Marcela Chocobar and Coty Olmos, have been found murdered in the last month.

According to Amnesty International, Sacayan's body showed signs of violence.

Mariela Belski, executive director of Amnesty International, said of the killings: “A dark cloud has set over Argentina's trans community.”

“Unless this latest wave of murders is effectively investigated and those responsible taken to justice, a message will be sent that attacking trans women is actually ok,” she added.

In 2012, President Cristina Fernandez de Kirchner personally handed Sacayan her national identity card recognizing her as a woman.

At a press conference, Kirchner called on security forces “to promptly investigate this terrible crime.”