Israeli troops shot and killed a 10-year-old Palestinian girl on Friday after militants fired mortar rounds at a Gaza Strip (search) settlement, injuring four Israelis, one of them a child, officials said.

Palestinian militants fired three mortars at the Neve Dekalim (search) settlement — which is adjacent to the Khan Younis (search) refugee camp — seriously wounding three Israelis, one of them a child, the army said. A fourth Israelis was lightly injured.

In response, soldiers fired at the refugee camp, where the mortars were apparently fired from, killing a 10-year-old girl, Palestinian security sources said.

The army had no immediate comment.

Palestinian militants often fire homemade mortars and missiles into Gaza Strip settlements, but rarely cause injury or damage.