A 13-year-old Utah boy has died from his injuries a day after a sand dune he was digging in collapsed and buried him at a state park, officials said Monday.

The boy had been digging a tunnel into the dune at southern Utah�s Coral Pink Sand Dunes State Park when it collapsed on him Saturday evening, park rangers said.

A family member alerted authorities, and rangers arrived to dig the boy out from what they said was about 6 1/2 feet (2 meters) of sand.

After rangers and Kane County Sheriff�s deputies rescued him, found he had a pulse, and administered CPR, the boy was transported to a St. George hospital and then to Primary Children�s Hospital in Salt Lake City. He died there Sunday after not regaining brain activity, the Utah Division of State Parks Department said.

The boy, Ian Spendlove, was from Santa Clara, a small town about 65 miles (105 kilometers) from Coral Pink Sand Dunes State Park, officials said Monday.

Campers and off-road drivers flock to the park near the Utah-Arizona border for the vibrant hue of its warm, pink sand, which is made out of eroding Navajo sandstone.

Devan Chavez, a spokesman for the parks agency, said he wasn�t aware of any similar incidents at Coral Pink Sand Dunes, but in 2012, another teen died after being trapped under a collapsed sand dune at Snow Canyon State Park, about 50 miles (80 kilometers) northwest.

Saturday�s dune collapse remains under investigation. Rangers said it happened quickly and they did not know how long the boy was buried.

Chavez offered condolences to Spendlove�s family and urged visitors to be safe, wear helmets or life jackets and alert others of recreation plans when in state parks.

�Always recreate with a buddy or someone who can help you or go and get help. And always let someone away from the area know where you�re going and what your plan is,� he said.

(AP)