...but only two of them were killed by the IDF.
The Al Qassam Brigades website has a feature about the seven Ramadan "martyrs" and the circumstances of their deaths.
Two of them were killed in "Zionist bombings." One was killed in an "accidental internal explosion." Two of them died in unspecified "accidents." One died from electric shock, and one more while in "treatment."
The website says these were "a constellation of Mujahideen who gave their lives cheaply in the way of Allah."