Officials say an oak tree limb fell on a tent in the heart of Yosemite National Park killing two young campers.

Park spokesman Scott Gediman on Friday morning declined to release the ages or any details about the two, describing them only as under age 18.

Gediman says the limb fell from a black oak tree at about 5 a.m. Friday in the popular Upper Pines Campground in Yosemite Valley, striking the tent where two minors were sleeping.

When park rangers arrived, both were dead.

Gediman said the campground is one of the most popular with a view of Half Dome.

The incident remains under investigation

In 2012, a parks concession employee died when his tent cabin was hit by a falling limb

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