(Reuters) – The relocation of a significant part of centrifuge machines to a safer location was due to a “terrorist attack” against Iran’s Karaj nuclear site, the spokesman for the Atomic Energy Organisation of Iran was quoted as saying on Friday. U.N. nuclear watchdog chief Rafael Grossi said on Thursday that Iran had moved a new workshop at Natanz that makes parts for centrifuges for uranium enrichment to an underground location. [L2N2WQ1RW] The workshop uses machines from a now-closed facility at Karaj, west of Tehran, that last June suffered what Iran says was a sabotage attack by Israel. …