This is repeated time & time again. Israel IS the occupying power in Gaza. It controls the airspace, borders, coastline, food, water, fuel & power supplies. There is no need for soldiers to be on its soil for it to be occupied. As an occupying power, it has an obligation to the enclave to ensure that sufficient supplies are admitted, but they fall short of that which is required.
Syrian troops sieze village above rebel-held parts of Aleppo (Reuters)
from the article: Israel's compassion in Haiti can't hide our ugly face in Gaza