Israeli strikes killed dozens of people on Sunday in Lebanon and the northern Gaza Strip, where the military has been waging a major offensive for more than a month that aid groups say has further worsened the humanitarian crisis in the besieged enclave.

Israeli tanks have surrounded a Gaza hospital, its director told CNN, as strikes reportedly hit the vicinity of other healthcare facilities in the Strip, heightening fears Friday that Israel’s military campaign is further endangering patients and medical staff in the besieged territory.