Story highlights The skull appears to be a few years old, authorities say

It was near where authorities discovered a decapitated head years ago

(CNN) Hikers found a human skull in rough terrain near the Hollywood sign in Los Angeles, authorities said.

Los Angeles Police said a pair of hikers discovered it Saturday afternoon at a trail in Griffith Park near the famous sign, CNN affiliate KABC reported.

The skull appeared to be a few years old, according to park rangers.

An investigation is ongoing, Lt. John Shah of Northeast Community Police told CNN.

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The skull was close to where authorities discovered a decapitated head in 2012.