President Joe Biden said the national security risks of Elon Musk’s foreign business deals are “worth being looked at.”

Biden suggested during a press conference Wednesday that the entrepreneur’s foreign sources of capital – including nearly $2 billion from a Saudi prince for his Twitter takeover – could pose a threat to national security, CBS News reported.

“I think that Elon Musk’s cooperation and/or technical relationships with other countries is worthy of being looked at,” Biden said, after chuckling. “Whether or not he’s doing anything inappropriate, I’m not saying that, but it’s worth being looked at.”

He said “there’s a lot of ways” to review the foreign investments, according to the Washington Post.