A lightning strike killed a Denver man and injured his wife while the couple was hiking Sunday on a Colorado trail, police said.

Authorities received a call around 1 p.m. regarding a 36-year-old man who was unconscious and not breathing on Bear Creek Trail in Boulder County.

Rescue officials found the man and his wife, 37, a quarter-mile from the trailhead, the Denver Channel reported. The unidentified man was airlifted to a hospital where he was pronounced dead, the report said. His identity was not released.

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A preliminary investigation indicated that man had been hit by a direct lightning strike on his upper body, the Boulder County Sheriff’s Office said.

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The man’s wife was not hit by the lighting, but was injured from the strike’s electrical current, police said. Her injuries are considered non-life-threatening. The woman's identity was not released.