A former Air Force sergeant who claimed to have seen top-secret photos of an alien base on the far side of the moon has died in a bicycle crash.

Karl R. Wolfe was killed in the crash on October 10 in Lansing, New York, after he was struck from behind by a tractor trailer traveling southbound on North Triphammer Road near Sharon Drive. He was 74.

Wolfe was rushed to Cayuga Medical Center where he later died from injuries sustained in the crash.

Although the crash is under investigation, no charges have been filed and the Tompkins County Sheriff's office did not release the name of the tractor trailer driver, the Ithaca Journal reported.

Karl R. Wolfe (above) was killed in the crash on October 10 in Lansing, New York

In 2001, Wolfe gained fame when he came forward with claims that he had he had seen photographic evidence of an alien structure on the far side of the moon.

In a video interview, Wolfe said that in the mid-1960s, he had a top secret clearance and worked for Tactical Air Command at Langley Air Force Base in Virginia.

Wolfe said his job was working as a electronic technician in photographic surveillance labs, and he spent most of his time working on machines that processed surveillance footage of Vietnam.

One day, Wolfe recalled that his superior told him to report to an NSA facility on the base to help with an issue with equipment used to process imagery from the first lunar orbiter mission.

Wolfe said he reported to the facility, which he described as a large hangar-type building with many foreign citizens in civilian clothes, accompanied by interpreters - a surprising sight to the military man.

The former airman recalled that he was alone in a darkroom with another Airman second class, when the other enlisted man said: 'By the way, we've discovered a base on the back side of the moon.'

The far side of the moon is seen in a 1972 photo taken by Apollo 16. Wolfe said that he saw an alien moon base in photos taken by the first lunar orbiter

Wolf (above) was working as a photo technician for the Air Force when he says he was called in to repair equipment that was used to process images from the first lunar orbiter

'I said, 'Whose? What do you mean?'' Wolfe recalled. He said he was fascinated by the statement but was fearful that someone would walk in on their conversation.

Then, Wolfe said, the Airman showed him a photo mosaic assembled from multiple passes by the lunar orbiter.

'He pulled out one of these mosaics, and showed this base which had geometric shapes - there were towers, there were spherical buildings, there were very tall towers and things that looked somewhat like radar dishes, but they were very large structures,' Wolfe said.

'Every day when I went home I thought, 'I can't wait to hear about this on the news,'' Wolfe said.

After serving in the Air Force, Wolfe attended the University of Buffalo with a dual major in Social and Cultural Anthropology, and Electronics Engineering.

Wolfe went on to become a self-help consultant. He never married, and had no children.