Blinken to visit Ukraine as Washington confirms Iranian missile shipments to Russia.

Editor's note: The story is being updated. U.K. Foreign Secretary David Lammy said on Sept.

10 that he would travel to Ukraine together with U.S. Secretary of State Antony Blinken later this week, Reuters reported. "I can confirm that Tony and I will be traveling to Kyiv this week, the first joint visit of this kind for well over a decade," Lammy said during a joint press conference with Blinken.

The U.S. top diplomat arrived in the U.K. for a two-day visit on Sept.

9 to discuss the situation in Ukraine and the Middle East. Speaking at a press conference in London, Blinken and Lammy said they are "completely aligned on the need to tackle Iran's malign activity in the region and beyond." Recent media reports indicated that Iran has supplied Russia with hundreds of ballistic missiles in a boost to its forces waging war against Ukraine.

Blinken confirmed the reports during his U.K. visit, threatening further sanctions against Tehran over the shipments. "We've warned Tehran publicly, we've warned Tehran privately, that taking this step would be a dangerous escalation," Blinken said. "Russia has now received shipments of these missiles."

Washington's confirmation comes a day after EU spokesperson Peter Stano said on Sept.

9 that Brussels has "credible" information that the shipments took place. Iran denied delivering ballistic missiles to Russia, calling reports to the contrary "psychological warfare." The Kremlin gave an evasive answer when asked about the reports, saying that Iran and Russia cooperate in "all possible areas."

What Iran's ballistic missiles, in Russia's hands, could mean for Ukraine Iran has delivered ballistic missiles to Russia, the Wall Street Journal reported on Sept.

6, a move the U.S. has described as a "dramatic escalation" in Tehran's support for Moscow's full-scale war against Ukraine.

The White House said it was "alarmed" by reports of the transfer, but what the