Israeli fire killed at least two people in Rafah and injured three others in Khan Younis in the south of Gaza, raising fear among Palestinians that the ceasefire could collapse altogether after Israel imposed a total blockade on the shattered enclave.

On Monday afternoon, two friends, Khaled al-Shaer, 60, and Musa Qishta, 59, were walking toward their destroyed homes in the city of Rafah near the Egyptian border with Gaza. They had gone out for a stroll to pass the time until that day’s Ramadan fast ended at sunset.