HIKO, Nev. (AP) — Nevada authorities say about 40 people gathered overnight at Area 51 with plans to storm the gates before leaving peacefully.

The Nye County Sheriff’s Office said in a video news release Friday that the group initially came together outside the Area 51 Alien Center in Amargosa Valley about 3 a.m.

Authorities say some of the people then went closer to the gates before they left after “heated warnings” from officers.

Everyone was gone by 5 a.m. They were described as being compliant and peaceful.

The gathering occurred about 95 miles (153 kilometers) from the events taking place near the tiny Nevada towns of Rachel and Hiko after an internet hoax posted in June invited people to “storm” the once-secret military installation, the focus of popular lore about government studies of extraterrestrial life and space aliens.

At least two people were detained earlier in the day by deputies at a different gate to Area 51.