In first such admission, mouthpiece of Supreme Council of National Security claims 'combination of intelligence, logistics, action' prove explosion was no accident

2 said killed and 3 injured at facility in Kahrizak, south of Tehran; local governor says incident caused by human error as oxygen tanks were being filled

Report comes as tensions between Israel and Iran grow, following claims Jerusalem was behind bombing of Natanz nuclear facility that reportedly set back work there by 2 years

Officials says powerful bomb was used to damage building involved in centrifuge production at Natanz, denies Israeli connection to other recent fires in the Islamic Republic

US experts cite satellite images and state TV reports; previously unknown Cheetahs of the Homeland says it is behind blaze

President Hassan Rouhani confirms Tehran running more advanced models to step up enrichment, in violation of 2015 pact

French president urges easing sanctions while pressuring Iranians to negotiate a return; Russia calls on Tehran to uphold commitments to 2015 deal, blames US for situation

Halting uranium enrichment at the heavily fortified Fordo was a major victory for the 2015 nuke deal; its reopening is seen as a dramatic bid by Tehran to leverage sanctions relief

Head of the country's atomic energy agency says Iran will stay below 20% threshold; announcement comes as Tehran says it will restart centrifuges at underground Fordo plant

Both Brussels and Moscow urge return to collapsing nuclear accord, though Putin's office says it understand's Tehran's position