Homeland Security Secretary Kristi Noem’s purse containing $3,000 in cash was stolen while she was dining at a popular Washington, DC restaurant over the weekend, an incident now under investigation by the US Secret Service.

Noem was eating with her family at The Capital Burger when she felt what she thought was her grandchild brush against her leg, said a person familiar with the incident. Moments later, she realized her purse was missing, according to the person, who isn’t authorized to speak publicly.