Construction work has started on Apple's expanded presence in Austin, Texas, the Austin America-Statesman reports. Crews are said to be doing earthwork at the new West Parmer site, and have already erected a concrete shell for what appears to be a three-story office building. So far, though, no signs have identified the project, its future occupant, or even the company doing the construction, although the developer is known to be Conor Commercial. A security guard has refused to say whether or not Apple is involved.