Paranormal investigators are looking into claims a figure-of-eight shaped craft was seen flying over the town in the New Mexico desert in the US.
But the following day it retracted the statement, saying it was in fact a damaged US Air Force air balloon.
Witnesses later came forward to say there had been alien bodies within the "crashed craft", which along with the wreckage were then taken to the mysterious top-secret Area 51 military base in Nevada.
Roswell now holds an annual UFO festival because of its notoriety, and sightings are still taking place.
The latest sighting was reported to the Mutual UFO Network (MUFON) by an unnamed student of the New Mexico Military Institute (NMMI) - a state funded educational facility in Roswell.
In a report to MUFON, which is the world's biggest organisation dedicated to UFO and alien research, the witness said: "I was going to dinner while attending NMMI.
"I was standing in formation outside of the mess hall when someone pointed out something in the sky.
"We all - about 15 of us - could see a figure-of-eight type of craft that was sideways."