Speaking at a virtual briefing with reporters, White House National Security spokesperson John Kirby said Washington has yet to see confirmation that missiles have moved from Iran to Russia.
North Korea has said since last week that it had tested "strategic" cruise missiles, implying they may be designed to carry nuclear warheads.
Ambrey said three missiles were reportedly launched by the Houthis, with two not reaching the sea and the third striking the bulk carrier.
The new UAV interception capabilities can be added to another recent addition in SPYDER - an upgrade tailored to defend against ballistic missile attacks.
Russia is now closer to acquiring Iranian ballistic missiles from Tehran just days after launching North Korean-made missiles into Ukraine, according to the US.
Less than half an hour after the launch, North Korean state media carried a statement from the defense ministry criticizing "military gangsters" in the United States and South Korea.
Iranian authorities in Lorestan in western Iran deny that an earthquake happened and deny rumors of explosions linked to a military center.
Alleged Israeli airstrikes that hit central Syria reportedly targeted an Iran-linked precision ballistic missile project.
Beijing and Moscow have called for sanctions to be eased on the North to jumpstart diplomatic talks and improve the humanitarian situation.
Iran is trying to develop hypersonic missiles which pose a greater threat to Israel than ballistic missiles.
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