The BBC has been given photos of Twitter office space that has been converted into bedrooms, which San Francisco authorities are probing as a possible building code violation.

One image shows a room with a double bed, including a wardrobe and slippers.

An ex-worker said new Twitter boss Elon Musk has been staying at the headquarters since he bought the firm.

He last month emailed all Twitter staff saying they "will need to be extremely hardcore" to succeed.

San Francisco's Department of Building Inspection has confirmed it is investigating potential violations following a complaint.

Mr Musk said the city was attacking companies for providing beds to "tired employees".

 

In a now-deleted tweet, Mr Musk posted that he would work and sleep in the office "until the org is fixed".

The BBC has also been given pictures of sofas at Twitter being used as beds.

Another conference room has an alarm clock, and a picture placed over a made-up bed.

Somehow it must be funny to work for a company which was just purchased by (one of) the richest man on earth and then he demands that you work overtime and sleep in the office.

Does Musk pay those people double? Or are they supposed to work twice the time, so that he gets even richer? Strange!