Palestinian medics say an Israeli strike on a home in northern Gaza killed three siblings aged 6 and under, among at least six people killed in airstrikes in the war-ravaged territory.

Israeli airstrikes killed at least 46 people in the Gaza Strip in the past day, including 11 at a makeshift cafeteria in an Israeli-declared humanitarian zone, medics said. In Lebanon, warplanes struck Beirut's southern suburbs and killed 33 people elsewhere in the country on Tuesday.

At least 23 people have been killed in Israeli air strikes on two houses in central Lebanon where displaced families were reportedly living, the Lebanese health ministry says.