A report of a suspicious item prompted officials to evacuate the Griffith Observatory on Saturday afternoon before the area was determined to be safe, according to police.
A bomb squad responded to the scene after a park ranger requested units shortly before 1 p.m., Los Angeles police told KTLA.
After a full search of the area with the bomb squad and a K-9, there was no evidence of a suspicious package and the area was considered safe just before 4 p.m., said LAPD Lt. Marie Fellhauer in a news conference.
Fellhauer said a package found on the east side of the outside of the building raised a "red flag" and employees contacted authorities.
It was not immediately clear what the package was, Fellhauer said.
Griffith Observatory reopened around 4 p.m.
The observatory initially reopened on Saturday after a brush fire ignited nearby on Tuesday and scorched around 25 acres.