Israel says 15 trucks carrying aid have been allowed into northern Gaza, where aid groups have warned that a monthlong Israeli offensive could cause a famine.

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, Palestinian medics said Wednesday. The Biden administration said Tuesday it won’t limit weapons transfers to Israel because it has made limited progress in increasing the flow of humanitarian aid to Gaza.

The new bombardment on both fronts comes on the verge of a deadline set by the United States for Israel to dramatically ramp up humanitarian aid allowed in Gaza or risk possible restrictions on US military funding.

The latest bombardment came as the U.S. said it would not reduce its military support for Israel after a deadline passed for allowing more humanitarian aid into Gaza.

Israeli airstrikes hit a cafeteria and a home in Gaza, killing at least 14 people, medical officials said. In Lebanon, warplanes struck the capital Beirut’s southern suburbs on Tuesday after the military ordered a number of houses there to evacuate.

Palestinian medical officials say Israeli airstrikes have killed at least 31 people in the Gaza Strip in the past 24 hours, including 11 at a makeshift cafeteria in an Israeli-declared humanitarian zone.