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.

The strike hit a house in the city of Jabaliya, which has repeatedly come under attack as the Israeli military has pressed an offensive in northern Gaza.