WASHINGTON — Iran’s Islamic Revolutionary Guard Corps plotted to assassinate Israel’s ambassador to Mexico starting late last year, but the effort was contained and there is no current threat, a U.S. official said on Friday.

The official, speaking on condition of anonymity, said the plot against the ambassador, Einat Kranz Neiger, was active through the first half of this year.

“The plot was contained and does not pose a current threat,” the official told Reuters. “This is just the latest in a long history of Iran’s global lethal targeting of diplomats, journalists, dissidents, and anyone who disagrees with them, something that should deeply worry every country where there is an Iranian presence.”

The official declined to say how the plot was foiled or offer more details about the operation.

The United States and its allies have frequently alleged that Iran and its proxies have sought to launch violent attacks against Tehran’s opponents.

Security services in Britain and Sweden warned last year that Tehran was using criminal proxies to carry out its violent attacks in those countries, with London saying it had disrupted 20 Iran-linked plots since 2022.

A dozen other countries have condemned what they called a surge in assassination, kidnapping, and harassment plots by Iranian intelligence services.

Britain’s domestic spy chief, MI5 Director General Ken McCallum, said last month that Iran was “frantically” trying to silence its critics around the world, and cited how Australia had exposed Iranian involvement in antisemitic plots and Dutch authorities had revealed a failed assassination attempt.

Israel has long been an Iranian target and particularly so after the Israelis engaged in an air war with Iran that included U.S. bombers attacking Iranian nuclear sites in June.

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(Reporting By Steve Holland, editing by Michelle Nichols and Lincoln Feast.)