An unnamed woman has been taken into federal custody after throwing a shoe at Hillary Clinton as the former Secretary of State began a Las Vegas convention keynote speech yesterday. The incident happened moments after Clinton took the stage before an Institute of Scrap Recycling Industries meeting at the Mandalay Bay resort.

Brian Spellacy, U.S. Secret Service supervisory special agent in Las Vegas, said the woman was being questioned and would face criminal charges. Spellacy declined to identify the woman, and he said it wasn’t immediately clear what the charges would be.