Armed men in camouflage gear came out of nowhere to stop a pair of adventure bikers who claimed they had discovered a secret back gate to Area 51 .

The terrified motorcyclists, who had just ridden past a sign which warned that 'deadly force' was authorized against trespassers, were forced to put their hands up when the two mystery men drew their guns.

They were riding on a dirt road in Nevada near the perimeter of the Air Force base where Area 51 is said to be located when they were stopped and told: 'Get the f*** outta here'.

Many conspiracy theorists believe Area 51, a remote corner of Nevada, houses UFO technology.

But the claims have mainly been debunked, and the site has been revealed to be a historic test site for surveillance aircraft including the U2 and SR-71, and the US Air Force’s stealth bombers.

This is the moment armed men dressed in camouflage gear pulled a gun out on two men who claimed they had found a secret entrance to Area 51

The 'camo-dudes' get out of a large white pick-up truck and bark: 'Get your f***ing hands up'.

One of them asks the bikers: 'Have you got anything on you?' and, after frisking him, asks what they are doing in the area.

Then the bald gunman, with a moustache, tells them: 'We are going to give you guys a chance. You turn around and get the f*** outta here.'

He warns them that if he sees them again in Lincoln County - which surrounds Area 51 - they will get a fine of $750.

They were forced to turn around by the men, who never identified themselves, and ride back towards Interstate 95.

On the video one of the bikers can be heard saying: 'That was the most gnarly thing I've ever been in'.

His friend replies: 'That was crazy, he was so aggressive.'

The pair were told to put their hands up and were then patted down by one of the men. He didn't have any identifying badges or features on his uniform

The pair were driving along a dirt road where the top-secret government site is supposedly located when they were stopped

THE RISKY WAYS YOU CAN GET CLOSE TO AREA 51 Area 51 is located in the southern desert of Nevada in an area known as Groom Lake. There are private residences near the base, but the owners have been in constant legal battles with the government due to security concerns. The closest unofficial access points are along the Nevada Extraterrestrial Highway. The road runs 98 miles southeast from Warm Spring of Nevada. This is on Highway 6 to Highway 93. There are no designated entrances to the site, aside from the front gate. The closest civilians can get is the 'Warning' signs on dirt roads leading to the base. In 2013, this map was published as part of a trove of CIA documents which confirmed that the secretive site does it exist. The base is highlighted in a square close to Nevada's border with California The front entrance is heavily guarded are kept under close surveillance using road sensors, cameras, and the careful watch of the Area 51 border security, known as the 'cammo dudes.' All surveillance and communication is channeled through the security facility on Bald Mountain. It has been suggested that this base contains long-range cameras that can track all vehicle traffic on highway 375. The closest legal place to view Area 51 is from the top of Tikaboo Peak, a mountain over 26 miles from the base. You can get closer, but run the risk of arrest or even death. In the past the base could be seen from places like Freedom Ridge and Whitesides–but these locations were annexed by the US Government in 1999. Observers have estimated that thousands of people are flown in from Las Vegas daily, to keep the base operational. Other employees arrive at the base via a mysterious white bus, which makes stops at Ash Spring, Crystal Springs, and Alamo—where it parks at the courthouse every night. It arrives at a bus gate, then drives along an entrance road believed to be seven miles long The closest access that anyone without permission can get to Area 51 are the warning signs at the front gates. (Source: VisitArea 51.com) Area 51 is surrounded by hundreds of miles of desert which is laced with off-road trails. The closet route is the Extraterrestrial Highway (highlighted in blue). Reports suggest staff at the base monitor traffic on the road Area 51 is shown in a small yellow square within the massive Air Force base at Groom Lake Extraterrestrial Highway is between Highway 6 and Highway 93 in Nevada, and is the closest main road to Area 51 Advertisement

They later uploaded footage taken on a helmet camera.

The clip, entitled Held at Gunpoint by Camo-dudes, was published on YouTube yesterday and has already got 10,000 views with many viewers seeing it as proof that the government has something to hide at Area 51.

The bikers wrote: 'EVERYONE SHARE LIKE CRAZY, WE MIGHT HAVE TO TAKE THIS DOWN SOON DUE TO THE US GOVERNMENT!! DON'T LET THEM HIDE THIS!!

'This is raw and shot in realtime. Not fake or PHONY! We bring you the extreme footage shot by us. I don't know how long it will be up until the Gov't makes us take it down!'

Camo-dudes is the unofficial name given to guards monitoring Area 51. It is not known if they are part of a military branch, or if they are contractors.

There is only one designated entrance to the site, the front gate. It is heavily guarded and kept under close surveillance using road sensors and cameras.

The closest legal place to view Area 51 is from the top of Tikaboo Peak, a mountain over 26 miles from the base.

In August Mail Online reported how a fleet of anonymous passenger aircraft at McCarran International Airport in Las Vegas were serving America's most secret military base.

The pair were shocked when they saw a white truck pull up behind them

Two men got out of the vehicle and started giving them directions. One of the mysterious men tells them to stand on the side of the road

The two men had just driven past a sign which warned: 'Use of deadly force authorized'

The exact location of Area 51 and what goes on beyond the entrances is a well-guarded secret

Many conspiracy theorists believe Area 51, a remote corner of Nevada, houses UFO technology. But the claims have mainly been debunked, with the site mainly being used to test surveillance equipment

Pictures taken at McCarran International Airport in Las Vegas shows the planes that are used to transport Area 51 employees every day