U.S. President Joe Biden stated shortly before midnight on Saturday night that he is “devastated and outraged” after the U.S. citizen Hersh Goldberg-Polin was identified among six bodies that Israeli forces recovered earlier in the day in a tunnel in Rafah.

Biden vowed that “Hamas leaders will pay for these crimes,” but then said that the United States “will keep working around the clock” to secure a deal—which would be between the Jewish state and the Hamas terror organization—to release the rest of the hostages.

“Hersh was among the innocents brutally attacked while attending a music festival for peace in Israel on Oct. 7. He lost his arm helping friends and strangers during Hamas’s savage massacre. He had just turned 23. He planned to travel the world,” Biden stated. “I have gotten to know his parents, Jon and Rachel. They have been courageous, wise, and steadfast, even as they have endured the unimaginable.”