Several children were killed in an Israeli airstrike at a water distribution point in central Gaza Sunday, health officials said, one of several deadly incidents in the territory that come as ceasefire talks in Doha falter.

After an Israeli airstrike killed eight Palestinians, including children, at a water collection point, Israel has said that it was a mistake. Officials said that Israeli strikes killed 139 Palestinians in the past 24 hours.

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.