US technology giant Amazon has informed employees of a new round of global layoffs in an email apparently sent in error.

A draft email written by Colleen Aubrey, a senior vice president at Amazon Web Services (AWS), was included as part of a calendar invite sent by an executive assistant to a number of Amazon workers late on Tuesday.

In the email, Aubrey refers to a swathe of employees in the US, Canada and Costa Rica having been laid off as part of an effort to "strengthen the company."

The message, which has been seen by the BBC, was apparently shared by mistake, as it was quickly cancelled. An Amazon spokesman declined to comment.

The title of the invite was "Send project Dawn email," an apparent reference to Amazon's code name for the job cuts.