On September 25, the Department of Homeland Security contract awarded $1.3 million to a Connecticut company called Radeco to provide ICE with modified versions of Boston Dynamics’ quadruped robots. But Boston Dynamics workers sent the petition letter with more than 300 signatures—half of them anonymous—to the company’s executives in early September and shared copies with The Boston Globe and WBUR public radio station.

“Many of us have gotten messages from friends and family, asking us in disbelief and horror if this news is true, and how we can live with ourselves if it is,” according to the petition. “The risk for Boston Dynamics is simply too great to continue with this deal.”

The petition described the signatories as employees who normally “love showing off what we do to our friends, family and the world” and who “love challenging ourselves to innovate and change the perception of what robots can do.” The 300 signatures come out of a total Boston Dynamics workforce of approximately 1,400 people.