Ten people were killed in an Israeli airstrike on Gaza on Sunday, including six children who were waiting to fill water containers near a refugee camp, emergency service workers said.

Israel’s military said a “technical error” had caused munition to land dozens of meters from its target. The victims were gathered near a water distribution point, health workers said.

The Israeli military has not yet commented on the strike, which witnesses said hit a crowd queuing to get water at a refugee camp.