More than 1,800 Palestinians have also been injured in the five-day offensive, which Israel launched on Saturday in what it called "an all-out war" against Hamas in response to militant rocket attacks on southern border towns from Gaza.
The Israeli army press office on Wednesday published a list of facilities targeted by the airstrikes, which included the office of Hamas Prime Minister Ismael Hania, a network of tunnels linking the Gaza Strip to Egypt, arms depots, militant training camps and checkpoints, rocket launchers and also escort boats used by Hamas.
In response to the Israeli airstrikes, Palestinian militants carried out rocket attacks on southern Israel border towns early on Wednesday. No casualties have been reported.
Earlier rocket attacks from Gaza by militant groups killed at least four Israelis in southern Israel.