Footage showing the moment Hala Khreis was killed as she tried to leave Gaza City went viral earlier this month. It’s one of a growing number of videos that show unarmed civilians holding white flags being shot dead.

Out in front, a few paces ahead of the others, Hala was walking with her grandson, Tayem, then 4, holding hands as they navigated a street littered with debris, a white flag in his other hand. Seconds later, a shot rang out and Hala slumped to the ground.

That unthinkable moment was captured on camera. The video surfaced earlier this month in a report by UK-based news website Middle East Eye. Watching it makes Sara and her siblings feel sick.