(file photo)

Twitter CEO Elon Musk emailed employees in the early hours of Wednesday to inform them about the microblogging site's remote-working policy, according to a report in Fortune magazine. 

"The office is not optional," Musk told employees in an email (which was sent at 2:30 p.m.), the outlet reported.

The report is based on a tweet by Zoe Schiffer, Managing Editor of Platformer.

According to Schiffer's tweet, the social media platform's new owner said in his email that the company's San Francisco office was "half empty yesterday."

However, it is worth noting that the billionaire has fired thousands of employees since taking control of the platform. 

Significantly, this is not the first time such an incident has happened.

Musk often shares brand-new corporate policies in late-night emails.

According to the Washington Post, he told staff that they would need to be "extremely hardcore" and encouraged them to work longer hours in an email at 2 a.m. shortly after the Twitter acquisition.

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