They were aware the site was at risk of strike prior to it happening.
1 - they moved uranium off site (or may do that regularly as standard practice).
2 - centrifuges were likely moved off site just to prior to the strike.
The whole facility looks to only take a small area, around the size of a basketball court, so have no doubt this will be able to set up in another small area. Possibly multiple decentralised areas after this attack.
So.... whose lying now? Still the Iranians ?