Kanye West's security team went into overdrive on Thursday, when it was reported there was an intruder in the office building where he rents a studio space for his creative/design work.

The rapper remained calm as police arrived and scoured the premises looking for any sign of danger. Kanye was taken out a back door of the building and headed for home immediately. Eventually, police were called off and it appeared there were no arrests -- perhaps a false alarm.

But the Kardashian-West security detail doesn't take threats like this lightly. Any breech of security is treated with the upmost seriousness after Kim's robbery at gunpoint in Paris last October. Events like this yesterday have to put Kanye on edge ...