Barak replied “It’s already been known for many years that they have a bunker that originally was built by Israeli constructors underneath Shifa,” which was used as a “command post” for Hamas and as a “junction of several tunnels”

“I don’t know to say to what extent it is a ‘major.’ It’s probably not the only…command post. Several others are under hospitals or in other sensitive places.”

…

Barak, who was Israel’s prime minister from 1999 to 2001, responded, “decades ago, we were running the place, so we helped them.” The Gaza Strip has been controlled by Hamas since 2007.

“It was many decades ago…that we helped them build these bunkers in order to enable more space for the operation of the hospital within the very limited size of these compounds.”