The State Department says it’s paying more than $2 million per month to provide 24-hour security to former Secretary of State Mike Pompeo and a former top aide, both of whom face “serious and credible” threats from Iran.

Pompeo and Hook led the Trump administration’s “maximum pressure” campaign against Iran and the report says U.S. intelligence assesses that the threats to them have remained constant since they left government and could intensify. The threats have persisted even as President Joe Biden’s administration has been engaged in indirect negotiations with Iran over a U.S. return to a landmark 2015 nuclear deal.