WASHINGTON - US federal government employees received an email late Saturday asking them to summarize their work accomplishments from the previous week by Monday night or risk losing their jobs, media reported.

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The emails were sent shortly after Elon Musk, who serves as US President Donald Trump's cost-cutting chief, issued a brief notice about the ultimatum on the social media platform X.

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"Consistent with President @realDonaldTrump's instructions, all federal employees will shortly receive an email requesting to understand what they got done last week," Musk said in a post. "Failure to respond will be taken as a resignation."

Federal employees -- including some judges, court staff and federal prison officials -- received a three-line email with this instruction: "Please reply to this email with approx. 5 bullets of what you accomplished last week and cc your manager," the Associated Press reported.

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The deadline to reply was listed as 11:59 pm on Monday, although the email did not include Musk's social media threat about those who fail to respond, the news agency added.

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Thousands of government employees have already been forced out of the federal workforce, either by being fired or offered a buyout, as the Trump administration works to streamline the government.