DEIR AL-BALAH, Gaza Strip — Israeli strikes killed dozens of people including children on Sunday in Lebanon and northern Gaza, where the military has waged a major offensive for more than a month that aid groups say has worsened the humanitarian crisis in the besieged enclave.

Rescuers in the Gaza Strip said 13 children were among 30 people killed by Israeli strikes in the territory's north. The first hit a house in Jabalia, killing at least 25 people including 13 children and injuring more than 30,