DEIR AL-BALAH, Gaza Strip — Aid groups are raising new alarm over Israel’s blockade of the war-ravaged Gaza Strip, where it has barred entry of all food and other goods for more than six weeks. Thousands of children have become malnourished, and most people are barely eating one meal a day as stocks dwindle, the United Nations says.

The warning came as Israeli strikes overnight and into Thursday killed at least 27 people, including at least six women and 15 children.

The humanitarian aid system in Gaza “is facing total collapse,” the heads of 12 independent aid organizations warned in a joint statement. They said many groups have shut down operations because Israel’s resumed bombardment the past month has made it too dangerous.

Meanwhile, a strike in the southern city of Khan Younis killed a family of 10, including five children, four women and a man, according to Nasser Hospital, which received the bodies. Strikes in northern Gaza killed two other couples with nine children, according to the Indonesian Hospital.

— The Associated Press