Apple installs banners, flags at Bill Graham Civic Auditorium ahead of Sept. 9 event

As can be seen in the above photo, workers were hard at work on Friday installing posters outside the massive 7,000-seat auditorium that will serve as the stage for Apple's big "iPhone 6s" unveil. The images were captured and posted to Twitter by CNET photographer James Martin.

Apple is taking advantage of the larger venue and has strung up dark blue flags on the auditorium's flagpoles and installed banners on light posts depicting a sound wave graphic designed for the iOS 9 version of Siri. The event's tagline, "Hey Siri, give us a hint," suggests Apple's virtual assistant will figure heavily in event announcements, perhaps as a feature addition to a hotly anticipated Apple TV refresh.

Also expected for reveal are new iPhone models with Force Touch displays and upgraded cameras. Less clear is the potential release of a so-called "iPad Pro" model, which is thought to feature a 12.9-inch display and stylus input. The most recent rumors claim Apple is planning to take the wraps off a new iPad keyboard, a less expensive gold Apple Watch and new Sport Band colors.

Apple's event is scheduled to start at 10 a.m. Pacific on Sept. 9. AppleInsider will be on the scene providing live coverage.