The concerns over the movement of the missiles was one of multiple threads of intelligence from various sources that led the US to believe Iran had a capability and intention to launch strikes against US targets.

On Tuesday US Central Command spokesperson Capt. Bill Urban said they had seen “indications that Iranian and Iranian proxy forces were making preparations to possibly attack US forces in the region.”

 

Trump pardons former Army soldier sentenced for killing Iraqi prisoner

 

It’s not clear if the Iran could launch the missiles from the boats or if they are transporting them to be used by Iranian forces on land.

The Pentagon is considering sending additional firepower to the region including anti-missile defense systems, the officials said.

Source: Iran moving ballistic missiles by boat, US officials say