At least 21 people have been killed after a war-damaged residential building collapsed overnight in Gaza City, with displaced families among those sheltering inside the six-storey structure. The building had reportedly been damaged in an earlier Israeli strike and was left structurally unsafe, but families continued living there amid the severe shortage of alternative shelter. The collapse triggered a desperate search-and-rescue operation as Palestinian Civil Defence teams, residents, UN agencies and Egyptian personnel worked through the wreckage. Rescue crews faced severe shortages of heavy equipment, with some responders forced to dig through the rubble by hand in an effort to reach people trapped underneath. Reports said dozens of people were initially feared trapped beneath the debris. WATCH