The city of San Francisco is reportedly investigating Elon Musk for converting some office space inside Twitter’s headquarters into sleeping quarters for employees.

When Twitter employees returned to work on Monday, they discovered that several conference rooms inside the company’s headquarters had been made over as bedrooms.

Forbes reported:

“A photo of one converted bedroom shared with Forbes showed bright orange carpeting, a wooden bedside table and what appears to be a queen bed, replete with a table lamp and two office armchairs just begging for convivial workplace collaboration.”