Time for other nations to step up in the Strait of Hormuz, says US

Ukrainian President Volodymyr Zelenskiy says Russia has been supplying Iran with drones and intelligence to help Tehran.

Asked about reports of Russia and China aiding Iran, Hegseth said: "As far as Russia and China, we know exactly what they're doing, what they are or are not doing."

"We don't have to air publicly what all of that is, but where necessary, we're addressing it, we're mitigating it or we're confronting it head on," he said without elaborating.

Hegseth also said he had visited troops in the Middle East on Saturday to witness the military operation against Iran.

(Reporting by Phil Stewart, writing by David Ljunggren and Doina Chiacu, editing by Michelle Nichols, Alexandra Hudson)