It's hard to make out exactly what the creature is from the grainy footage given the distance it stands from the camera. Hundreds of people have seen the clip taken near the village of Taco Palta y Marta in north-west Argentina and were quick to comment their own views.
Anchorage television station KTVA reports the bear got inside the building Sunday after walking through an open door near the loading dock. The facility was closed, but U.S. Postal Service spokeswoman Dawn Peppinger says about 75 employees were sorting mail when the bear got inside the post office near the Ted Stevens Anchorage International Airport.
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