A 29-year-old police officer was killed in an Israeli air strike in the Gaza Strip, according to Ashraf al-Kidra, Gaza's health ministry spokesman.
However there was a conflicting report from Israel's Channel 2 TV claiming the air strike targeted an Islamic militant involved in a recent rocket attack on the southern Israeli town of Eilat.
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White House budget officials outlined the information during a telephone call with reporters given on condition of anonymity.
A prison officer is to be charged with gross negligence manslaughter and misconduct in public office in relation to the death of an inmate.