Israeli strikes in the Gaza Strip killed at least 30 people on Sunday, including six children at a water collection point, while the Palestinian death toll passed 58,000 after 21 months of war, local health officials said.

Gaza's civil defence agency said Israeli air strikes on Sunday killed more than 40 Palestinians, including at a market and a water distribution point, as talks for a ceasefire between Israel and Hamas stalled.

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