In a bold and emotional statement, Bill Gates has accused fellow billionaire Elon Musk of endangering the lives of poor children around the world. The strong words came during an interview where Gates expressed deep anger over recent funding cuts to global health programs.

The Microsoft co-founder and philanthropist condemned his fellow billionaire for overseeing deep cuts to the U.S. Agency for International Development in the Trump administration.

Bill Gates is not impressed by Elon Musk’s work with the Department of Government Efficiency. In an interview with the Financial Times, he described Musk’s work as hurting the most vulnerable people on the planet.