LITTLETON, Colo. (CBS4) – South Metro firefighters responded to a water rescue at Chatfield State Park at around 3:26 p.m. on Saturday.┬áRescuers say one person was in the water and was brought to shore.

The rescued person was taken to a hospital in serious condition.

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Two dive teams deployed to find the missing person. Officials say, about 45 minutes later, teams found a man under water. He was taken to a hospital while receiving CPR.

He did not survive.

Officials say an inner tube flipped.

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The Douglas County Sheriff’s Office says it is investigating the incident as an accidental drowning. Both people were not wearing life jackets.