Two fans may have accidentally stumbled onto the “Star Wars: Episode VII” set, revealing some interesting information from the upcoming production to fan site MakingStarWars.net.

According to the fan site, the two friends “Alan and Paul” wrote an email to Making Star Wars about their experience at a park in London. The two saw props and people dressed in Stormtrooper costumes and quickly tried to snap photos of what they saw.

“Unfortunately [the photos are] not quite as vivid as we’d have liked, but with a bit of zooming you should definitely be able to make out the Stormtrooper,” they wrote to the fan site. “There were 4 I think in this area, running through the explosions, I think I remember another 4 or so coming from the opposite direction, but that was not all.”

The two friends also spotted some “ruins” with “abandoned” technology from what allegedly appeared to be from X-wing fighters. The ship was on the smaller side but reportedly fit two people, according to Making Star Wars. There was also an explosion nearby, which was followed by a close encounter with two of the “Star Wars: Episode VII” characters. (Click here to view to the photos)

“The smoke from the explosions gave the area a misty look as if we were on Dagobah or something,” the friends wrote. “To hear ‘Run Chewie’, coming, unmistakably from the mouth of Han/Harrison Ford… it was electric! I think that moment… It was confirmation that this film IS STAR WARS!”

The friends also told Making Star Wars they might have seen Harrison Ford dressed as a Stormtrooper on set, but they were allegedly too far way to confirm if it really was them

“Between takes the Stormtroopers removed their helmets and they each had a protective black head sock on for their hair/ears that went down to their neck,” the two friends explained. “On the far left hand side there was a Stormtrooper who had no head sock on and it looked like he had medium length hair that was styled.

“There was activity around this one particular Stormtrooper from people on the set. It looked like he was reading from a clipboard and had make up artists around him.  Not sure who this was but it looked like he could have been shooting the scene without any helmet. I cannot say whether it was Harrison Ford but he fit the description.”

“Star Wars: Episode VII” is set to hit theaters on Dec. 18, 2015.