Microsoft is planning a round of job cuts as the software maker looks to integrate Nokia's handset unit, Bloomberg reported, citing people with knowledge of the company's plans. The reductions could be in the Nokia unit and the parts of Microsoft that overlap with that business, as well as in marketing and engineering, Bloomberg reported.

An official announcement is expected later this week from Chief Executive Satya Nadella.

Some of the job cuts will be in marketing departments for businesses such as the global Xbox team, and among software testers, while other job cuts may result from changes Nadella is making to the engineering organization, Bloomberg reported.

Last week, Nadella sent an email to employees promising to "flatten the organization and develop leaner business processes" but deferred any comment on widely expected job cuts at the software company.