Israeli tanks have surrounded Gaza’s Indonesian Hospital as Israel’s military continues its relentless assault on the Gaza Strip’s health infrastructure. Earlier today Israeli artillery fire killed at least 12 people inside the medical complex, where about 700 others, including medical staff and injured people, remain besieged.

Egyptian television showed ambulances carrying sick and premature babies passing through the Rafah border crossing to Egypt, after the U.N. assisted in moving 31 premature babies from Gaza’s Al-Shifa Hospital to Rafah on Sunday. UNICEF warned the babies’ conditions were incredibly fragile after the multiple moves in “extremely dangerous conditions.” Other babies died as medical services collapsed at Al-Shifa. Doctors say babies had to drink formula prepared with contaminated water, further endangering their survival. A World Health Organization team visited the Al-Shifa Hospital, which it called a “death zone,” and lauded the “heroic” healthcare workers sacrificing everything to treat patients.

WHO assessment crew member: “As healthcare professionals, I am absolutely humbled by the work of you and your teams, the heroic efforts that you’ve made. I mean, I have no words.”

Israel has claimed it uncovered a Hamas tunnel at the Al-Shifa Hospital. The claim was rejected by Hamas and medical workers and has not been verified by independent parties. Israel also said hostages are being held at Al-Shifa. Hamas has previously said it took several hostages to hospitals for treatment.