Washington (CNN) Saudi Arabia does not appear to have paid the $1 billion that President Donald Trump said it has paid to house a deployment of US troops to the kingdom, according to the Pentagon.

Trump had previously touted Saudi Arabia's financial contribution, telling Fox News last week, "I said, listen, you're a very rich country. You want more troops? I'm going to send them to you, but you've got to pay us. They're paying us. They've already deposited $1 billion in the bank."

But the Pentagon says discussions about how Saudi Arabia can help pay for the cost of the US military deployment there are ongoing.

"The Saudi government has agreed to contribute to the costs of these activities, and discussions are ongoing to formalize these contributions. Contributions of this nature do not lead to the deployment of additional U.S. forces, and they do not drive DOD to take on new missions or responsibilities," Pentagon spokesperson Cmdr. Rebecca Rebarich told CNN in a statement.

"While we will not comment on specific bilateral defense agreements, more broadly the United States encourages burden-sharing among partners in support of shared security interests, to include defense of the Arabian Gulf," a State Department official said.

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