Elon musk is visiting Twitter headquarters as the company continues to negotiate a deal with him. The deal recently fell through after a series of meetings between the two companies ended abruptly, and it is unclear whether a new proposal has been submitted.

The Tesla CEO has been working with Twitter for months on a potential acquisition of the social media platform, but negotiations have stalled in recent weeks.

Elon Musk is in the building! The CEO of Tesla and SpaceX visited Twitter HQ on Wednesday to talk about artificial intelligence, according to a report on CNBC. The meeting was reportedly scheduled before a deal was struck with Saudi Arabia to invest $2 billion in the company.

At the meeting, Musk reportedly discussed how AI could be used by Twitter to make it easier for people to find what they want on the platform. In addition, he reportedly talked about how AI could be used to make it easier for advertisers to target their customers.

“We’re going to need some kind of regulatory structure,” Musk said during the meeting, according to CNBC. “Otherwise we’ll end up like China.”

Elon Musk, the CEO of Tesla and SpaceX, visited Twitter HQ today.

The visit was part of a deal that was recently made between the two companies, a deal that will give Twitter more access to Tesla’s self-driving car technology.

Just a few days before the deadline for a potential deal with Elon Musk’s Tesla, Twitter is preparing to welcome him to its headquarters.

The CEO will be in San Francisco on Monday to meet with Twitter employees and leaders. He’s expected to discuss the company’s mission and how he thinks it can help people communicate more freely and access information easily.

Twitter has been struggling financially since its initial public offering in 2013, but it recently hired several executives from Tesla, including former Vice President of Growth Keith Rabois, who joined as COO earlier this year.

It appears as though the meeting may be part of a strategy to save both companies from going under. The two companies have been exploring an acquisition for months, but so far no deal has been reached.

The Tesla founder and CEO have been long-time supporters of Twitter’s mission, and the social media platform has returned the favor by doubling down on its commitment to decentralization and openness over the last few years.

As part of that mission, Twitter has decided not to sell ads against tweets or user accounts—a decision that’s been controversial with some users but has helped Twitter grow into a profitable company. And now Musk is visiting to see if it’s time for more investment in the company.

Twitter’s COO Adam Bain said: “We’ve seen him come through our doors many times since he first invested in us in 2011, so we’re thrilled that he’ll be back again.”

Tesla and SpaceX CEO Elon Musk is expected to visit Twitter’s San Francisco headquarters on Thursday as a part of an effort to increase the company’s visibility in Silicon Valley.

The billionaire entrepreneur is scheduled to have a meeting with Twitter CEO Jack Dorsey and other executives, according to The Washington Post. Musk has previously said that he wants to increase his presence in the industry by investing in companies that are similar to Tesla and SpaceX.

Twitter CEO Jack Dorsey and Tesla CEO Elon Musk are in the building today, as their companies’ deals with each other come to an end.