Smoke billows from buildings following an Israeli air strike on Gaza City
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Israel 'ready for escalation' of Gaza conflict

At least 12 people have been killed in the Gaza Strip, Palestinian officials say, as the Israeli military prepares "all options" to stop rocket fire.

Six people died in an air strike on a house in Khan Younis, while four were killed when a car was hit in Gaza City.

Yolande Knell reports.

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