Katsiaryna Bartko, a 33-year-old Belarusian cancer survivor, has been in ICE custody since June 4, 2026, and held at the Midwest Regional Reception Center in Leavenworth, Kansas since June 19. After thyroid cancer surgery, Bartko requires daily hormone medication and calcium supplements to manage permanent hypoparathyroidism and chronic hypocalcemia. Medical records show she was hospitalized three times in four days in early June with dangerously low calcium levels, including an emergency visit on June 6 where she appeared "in acute distress" and required intravenous calcium treatment. Her partner alleges she was initially denied prescribed medications despite facility intake records documenting her medical needs, though she has since received some medications after media contact. Bartko, who entered the U.S. legally on an F-1 student visa in March 2022, filed for asylum in February 2023 based on her political activism in Belarus's pro-democracy movement and opposition to Belarus's support for Russia's invasion of Ukraine. A support letter from a Belarusian democratic organization states she could face arrest and persecution if returned.