A UFO expert claimed to have spotted two alien vessels parked on an oddly-shaped comet. The expert came across the strange objects while going through NASA’s photos of comet 67P/Churyumov-Gerasimenko.

Scott Waring of ET Data Base found the photo of the comet in the website for NASA’s Jet Propulsion Laboratory. It was taken during the European Space Agency’s (ESA) Rosetta Mission, which was carried out with support from NASA.

According to NASA, comet 67P is known for its active pits that emit dust into space. Aside from these, the comet has a very distinct irregular shape.

Comet 67P is also known as a “singing” comet because it produces oscillations in the magnetic field around it. According to NASA, the sounds the comet produces fall below the frequency that humans can hear or detect.

Upon inspecting the image, Waring spotted two strange objects that appear to be hiding within the comet’s crevices. Located near the bottom part of the comet, one of the objects had a round shape while the other one was cube-like.

According to Waring, the two vessels may have landed on the comet a long time ago. He theorized that these UFOs could be responsible for the “songs” or messages that NASA and the ESA have been receiving from comet 67/P. It is possible the vessels might be attempting to establish communications with other worlds or they could be trying to signal another nearby alien vessel.

During a previous mission, the ESA successfully landed a robotic probe on comet 67/P. Dubbed as Philae, the probe landed on the comet on Nov. 12, 2014. Unfortunately, after only three days, the ESA lost contact with the drop after its battery power started to drop.

In 2017, a new mission known as Comet Astrobiology Exploration Sample Return (CEASAR) was proposed to the New Frontiers program of NASA. One of CEASAR’s main objective was to return to comet 67/P in order to collect samples.

Unfortunately, the proposed mission was scrapped in favor of another entry to the program. CEASAR lost to Dragonfly, which is a proposed robotic mission to Saturn’s moon Titan.