CAIRO/GAZA - An Israeli airstrike on a school sheltering displaced families in northern Gaza killed at least 10 people on Wednesday, while another hit a children's hospital, medics said, as three European leaders called on Israel to end its blockade on aid.

An Israeli air strike on a school sheltering displaced families in northern Gaza killed at least 10 people, while another hit a children’s hospital, local health authorities said, taking Wednesday’s death toll to 20.