High-resolution images taken by Maxar Technologies on June 22 show six new craters - likely the entry points of US munitions - as well as grey dust and debris scattered across the mountainside from the impacts, the BBC reports.

To hit such a deep-underground target, bombs called Massive Ordnance Penetrators (MOPs) are needed. The Pentagon recently confirmed that they were used in the operation.

Stu Ray, senior imagery analyst at McKenzie Intelligence Services, told BBC Verify:"You won't see a huge explosion effect at the entrance because it's designed to explode deeper into the object, not at the entrance."

He added that it appeared that three bombs had been dropped at two different impact sites, and the gray color of the ground appeared to indicate concrete debris blown out by the explosions.

The tunnel entrances appear to be blocked. With no visible craters or impact points near them, he believes this could be an Iranian attempt to"mitigate the risk of deliberate aerial bombardment of the entrances."

It is unclear how much damage the strikes caused to the nuclear site itself. It appears that Iran took steps in anticipation of the strikes in the days leading up to them.