Iran has named a suspect in the attack on its Natanz nuclear facility that damaged centrifuges there, (Reza Karimi) saying he had fled the country “hours before” the sabotage happened.

While the extent of the damage from the 11 April sabotage remains unclear, it comes as Iran tries to negotiate with world powers over allowing the US to re-enter its tattered nuclear deal and lift the economic sanctions it faces.

Already, Iran has begun enriching uranium up to 60% purity in response – three times higher than ever before, though in small quantities. The sabotage and Iran’s response to it also have further inflamed tensions across the Middle East, where a shadow war between Tehran and Israel, the prime suspect in the sabotage, still rages.