The Israeli military carried out further strikes in areas of Gaza beyond its immediate control, in the latest violation of a ceasefire deal brokered by the US in October.
The attacks killed at least three Palestinians, including a 15-year-old boy, in and around Khan Younis and injured many more near the Bureij refugee camp, Al Jazeera reported.
Israeli forces also continued to demolish homes and infrastructure across northern and eastern Gaza, including Gaza City neighbourhoods, saying they were targeting militant facilities.
In southern Lebanon, meanwhile, an Israeli drone strike on Sunday killed two people after targeting a car near the town of Bint Jbeil, the Lebanese ministry of health said.
The attack reportedly occurred in the Ayn al-Mizrab area, destroying the vehicle and damaging nearby buildings.