Secretary of State Mike Pompeo Michael (Mike) Richard PompeoTreasury sanctions individuals, groups tied to Russian malign influence activities Navalny released from hospital after suspected poisoning Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers MORE canceled his planned trip to Moscow Monday and headed to Brussels to meet with European allies to discuss "threatening actions and statements by the Islamic Republic of Iran," the State Department said.

Pompeo is still planning to meet on Tuesday with Russian President Vladimir Putin Vladimir Vladimirovich PutinNavalny released from hospital after suspected poisoning Ex-Trump national security adviser says US leaders 'making it easy for Putin' to meddle The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting MORE and Foreign Minister Sergey Lavrov in Sochi, Russia, according to State.

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Pompeo is scheduled to discuss "the full range of bilateral and multilateral challenges" with Putin and Lavrov, according to the State Department.

Pompeo is scheduled to discuss a number of issues, including Iran, with officials from the United Kingdom, France and Germany while in Brussels, according to the State Department.

Tensions with Iran have flared following national security adviser John Bolton John BoltonMaximum pressure is keeping US troops in Iraq and Syria Woodward book trails Bolton, Mary Trump in first-week sales Ex-NSC official alleges 'unprecedented' intervention by White House aides in Bolton book review MORE’s announcement last week that the U.S. would deploy a carrier strike group to the region after what the U.S. called “troubling and escalatory indications and warnings” from Tehran.

Iran responded to the announcement by saying it will reduce its commitments under the 2015 nuclear deal reached under the Obama administration, which the Trump administration withdrew from roughly a year ago.

The move of the USS Abraham Lincoln carrier strike group into Central Command's jurisdiction is part of an increasingly aggressive posture toward Tehran, which includes labeling Iran’s Islamic Revolutionary Guard Corps as a foreign terrorist organization.

Iran responded in kind, designating all U.S. troops in the Middle East terrorists.

Updated at 8:39 a.m.