Elon Musk’s SpaceX is set to invest $2 billion in his artificial intelligence startup xAI, as part of a broader $5 billion equity round, according to a report by The Wall Street Journal. The deal would mark SpaceX’s first investment in xAI and significantly deepen the financial and operational ties between Musk’s business ventures.

According to a Wall Street Journal report that cites investors close to SpaceX, the company has agreed to invest $2 billion in Musk’s AI startup xAI. The investment would reportedly be part of the $5 billion equity raise (along with another $5 billion in debt) that Morgan Stanley announced at the end of June.