At least 21 people were killed across Gaza on Sunday in a series of Israeli air strikes, according to Gaza's civil defense agency. The strikes targeted several locations, including Zuwaida town, Nuseirat, and areas near Khan Yunis, resulting in the deaths of civilians, including women, children, and a journalist. Hospitals in the region confirmed the fatalities, while numerous others were reported injured. The escalation comes as Israel and Hamas accused each other of violating a ceasefire, and Israel halted humanitarian aid convoys into Gaza, citing a breach of the agreement by Hamas.