The UN’s unflinching expert on Palestinian affairs Francesca Albanese said Tuesday that Washington’s sanctions following her criticism of the White House’s stance on Gaza are a “violation” of her immunity.

The United Nations’ Special Rapporteur on the occupied Palestinian territories made the comments while visiting Bogota, nearly a week after US Secretary of State Marco Rubio announced the sanctions, calling her work “biased and malicious.”

“It’s a very serious measure. It’s unprecedented. And I take it very seriously,” Albanese told an audience in the Colombian capital.