Two Dutch men arrested in the US for trying to enter a military base part of Nevada known as Area 51, have been released on bail of €500 each.

The two have been ordered to remain in the US and will appear in court on Monday, charged with trespassing, police in Nye Country said on Facebook.

The men, Ties Granzier aged 20 and Govert Sweep aged 21, both run YouTube channels and there was a drone, camera and laptops with them in the car they were driving. They were arrested on Tuesday, three miles inside the security zone, after telling police they had seen the signs but wanted to look at the site anyway.

Area 51, around 120 miles north of Las Vegas, is home to a heavily guarded US military base. According to UFO conspiracy theorists, it is also home to the remains from a flying saucer that supposedly crashed in Roswell, New Mexico in 1947.