Amos Harel, Haaretz Correspondent and The Associated Press: Mortars and rockets hit Negev after deadly IDF raid near Gaza
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Name:Guido
City: ParisState: France
The Jerusalem Post is reporting that the four Gazans that were killed were 300 meter away from the border.

In other words they were deep into their own territory.

A neutral observer like me must therefore conclude that it was the IDF that violated the ceasefire.