Seemingly from an Instagram account and then spreading through Tumblr, a photo allegedly taken by a Catching Fire crew member in Atlanta depicts a big set being constructed.

The photo shows an indoor set roughly two stories high. It appears to be circular and entirely enclosed. Only the skeleton of the structure has been built so far.

The authenticity of the photo has yet to be confirmed, but our friends at Mockingjay shared the photo and we trust their and the community’s instinct. Our best guess as to the source of this photo is a crew member who wanted to share what he’s up to with his/her Instagram followers. They very likely did not receive permission from the studio to release this.

We do know for sure that work on The Hunger Games: Catching Fire is underway in Atlanta and will continue for the next couple of months. The crew will also be heading to Hawaii to film crucial arena scenes. Numerous stars including Jennifer Lawrence, Josh Hutcherson, and Liam Hemsworth have all recently been spotted in Atlanta. There are murmurs that The Hunger Games author Suzanne Collins is also in town.

We hope additional photos from the set surface, and if they do we’ll be sure to share them with you! Catching Fire hits theaters November 2013.