Israel’s defense minister said Monday the military would expand its operations in the southern Gaza city of Rafah, while the chief prosecutor of the International Criminal Court announced he’s seeking arrest warrants for both Israeli and Hamas leaders in connection with their actions during the seven-month war.

Prosecutor Karim Khan said that he believes Prime Minister Benjamin Netanyahu, Defense Minister Yoav Gallant and three Hamas leaders —Yehia Sinwar, Mohammed Deif and Ismail Haniyeh — are responsible for war crimes and crimes against humanity in the Gaza Strip and Israel.

U.S. national security adviser Jake Sullivan met with Gallant and the Israeli military leadership in Tel Aviv earlier Monday. Sullivan’s visit comes two weeks into the military’s foray into Rafah, where troops have been battling Hamas fighters and escalating bombardment.