The story: Iran has vowed that it will respond “firmly and immediately” to any action against it as the International Atomic Energy Agency (IAEA) Board of Governors mulls whether to censure Tehran. This comes as a senior Iranian nuclear official has alluded to the possibility of “human sabotage” being the cause of traces of uranium found in three undeclared sites.

Iran has warned that if the Board of Governors adopts a resolution proposed by the US and the E3 (Britain, France and Germany), it could derail efforts to revive the 2015 nuclear deal—and even impact cooperation with the UN nuclear watchdog.

The coverage: The US and the E3 drafted a resolution on June 1 to call on Iran to cooperate with the IAEA in its investigation into traces of uranium found in three old but undeclared sites...