WASHINGTON: Elon Musk said US federal workers had "another chance" to justify their work or lose their jobs, as the original deadline passed Tuesday with staff at multiple federal agencies told to disregard his request.

Musk, the world's richest person and President Donald Trump's biggest donor, had originally given federal government employees until the end of Monday to explain their work achievements in an email.

The demand represents the latest challenge from Musk against government workers as his Department of Government Efficiency (DOGE) works toward gutting federal staffing and spending.

"Subject to the discretion of the President, they will be given another chance," Musk said Monday evening on X, which he owns.

Failure to respond a second time will result in termination," he added, without providing a new deadline.

The deadline came and went with much confusion among an already anxious workforce after several US federal agencies – including some led by prominent Trump loyalists – told staff to ignore the email, at least temporarily.