Microsoft could lay off thousands from the company this week, a total that could top the 2009 cuts that saw 5,800 employees lose their jobs, according to a new report from Bloomberg.

This could be Microsoft's biggest employee cut in the company's history, according to the report, with layoffs "probably" centering in the Nokia and Microsoft divisions as well as its marketing and engineering departments. The latter, according to Bloomberg's sources, could include the global Xbox team and its U.K. European headquarters.

The report states that individuals "with knowledge of the company's plans" said Microsoft's restructuring is still in the planning phases, but could be carried out as early as this week. When asked for comment on the report, a Microsoft spokesperson declined to comment.

Microsoft's employee count as of June 5 was 127,104, which includes the 30,000 that came with its acquisition of Nokia in April. Following an open letter sent to employees last week noting "significant" changes that need to be made to engineering and organization within Microsoft, CEO Satya Nadella — who took over from Steve Ballmer earlier this year — declined to respond to questions regarding layoffs. He did say more details on the changes he mentioned will be shared on July 22, when Microsoft shares its Q4 financial report.