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.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Israel's compassion in Haiti can't hide our ugly face in Gaza