Microsoft has posted and then pulled a series of security updates, claiming "human error".

The updates for Microsoft Office for Mac were posted on the Web on Tuesday but shortly afterwards taken down again. The company claims they were never supposed to be posted and were unfinished.

"The updates posted in error were pre-release binaries that had been staged internally as part of our testing for an upcoming release," the company said on its Security Response Center Blog. "Due to human error, they were accidentally published to the public websites before our full testing release process was complete."

Microsoft also said that the updates were not related to a recently discovered flaw in Word. The updates will be officially released when they are past the pre-release stage.