United Nations school in Gaza damaged by Israeli shellfire
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Gaza: 'Fifteen killed' in UN-run school hit by Israeli fire

Palestinian health officials have said at least 15 people were killed when a United Nations school in Gaza was hit by Israeli shellfire.

More than 3,000 people had taken refugee in the school in Gaza's Jabaliya refugee camp, which was attacked without advance warning.

The Israeli military said it was investigating what happened, but added it had struck dozens of targets overnight.

Martin Patience reports from Gaza.

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