Dutch YouTubers Ties Granzier and Govert Sweep were arrested at Area 51 in the American state of Nevada, the NYE County Sheriff's Office said on Facebook. They told the police that they saw and understood the no trespassing warnings, but wanted to look at the site.

According to the local police, the duo had a drone, cameras and laptops on them. They recorded footage on the Area 51 site - a test location for the United States air force, where popular conspiracy theories say the American authorities experiment on aliens.

20-year-old Granzier and 21-year-old Sweep were arrested on Tuesday. They both face charges of trespassing.

In July an event appeared on Facebook, calling people to storm Area 51 on September 20th. More than two million people indicated that they would do so. The initiator of the event took it offline, after a visit from the FBI. The event was instead turned into a festival near the site, according to NOS.

Ties Granzier has a DIY building and restoration channel on YouTube with over 735 thousand followers, Govert Sweep has a ghost hunting channel with over 300 thousand followers.