Elon Musk in a twitter message has sounded ultimatum to Tesla employees to return to office, making clear his preference for return-to-office mode, NDTV reported sourcing from Bloomberg.

His message also set off buzz that Twitter's policy may change once he takes over.

In the Twitter message on Tuesday, the chief executive officer of Tesla Inc instructed electric-car maker's executive staff to be ready for work from office.

"Remote work is no longer acceptble" [sic], Musk wrote that "anyone who wishes to do remote work must be in the office for a minimum (and I mean *minimum*) of 40 hours per week or depart Tesla. This is less than we ask of factory workers,” Musk wrote.

He also specified that the office “must be a main Tesla office, not a remote branch office unrelated to the job duties.

Musk also responded to a follower asking him to address people who think going into work is an antiquated concept.

The NDTV report further gave details of views of Keith Rabois, a Silicon Valley venture capitalist and entrepreneur, who tweeted an anecdote that speaks to his friend's management style.

Rabois said, at Space Exploration Technologies Corp., Musk once took strict view of interns milling around while they waited in a line for coffee.

According to the venture capitalist, the technocrat had considered it as an affront to productivity. Musk had once threatened to fire all the interns if it happened again, Rabois, said.

The reference to Tesla factory workers comes amid the prevailing situation at the carmaker's plant in Shanghai, where thousands of staff have been effectively locked in for months, working 12-hour shifts, six days a week.

The media report also said many were sleeping on the factory floor as part of a closed-loop system meant to keep Covid out and cars rolling off the production line.