At Microsoft ’s 50th anniversary celebration on Friday, a software engineer in the company’s artificial intelligence division interrupted the event with a message: Stop allowing the Israeli military to use Microsoft’s AI products.

At the time, Microsoft AI CEO Mustafa Suleyman was delivering a speech.

“Mustafa, shame on you,” the employee, Ibtihal Aboussad, said as she walked towards the stage at the event in Redmond, Washington. “You claim that you care for using AI for good, but Microsoft sells AI weapons to the Israeli military. Fifty thousand people have died, and Microsoft powers this genocide in our region.”