An Israeli airstrike on a school sheltering displaced families in northern Gaza killed at least 23 people, while another hit a children's hospital, local health officials said.

At least 10 people have been killed in an Israeli attack that sparked a fire at a school sheltering displaced people in Gaza City, including one child who was burned to death in the blaze.

Israel was keeping up its intense bombing campaign in the enclave, which has exacted a heavy price on civilians struggling to find safe places to shelter.