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.

Gaza health officials say Israeli airstrikes have killed at least 19 people including six children at a water collection point.

Israel and Hamas appeared no closer to a breakthrough in indirect talks meant to pause the war and free some Israeli hostages after Prime Minister Benjamin Netanyahu’s Washington visit last week.