Cops Search Wooded Area for Clues in 7-Year-Old Kyron Horman's Unsolved 2010 Disappearance

Kyron Horman was 7 years old when he vanished on June 4, 2010.

Officials investigating the disappearance of an Oregon boy who vanished without a trace in 2010 searched a wooded area Sunday for any clues that would lead to answers in the unsolved case.

A search-and-rescue team looking for Kyron Horman scoured a five-mile stretch near Skyline Elementary School, an area of rural northwest Portland steeped with thick and dense brush, officials said.

Kyron was 7 years old when he vanished on June 4, 2010.

His disappearance sparked the largest search-and-rescue operation in the state to date, but no signs of the little boy were ever found.

Sunday’s search was no different, officials said.

Read: 5 Years After Kyron Horman Vanished, His Stepmom Insists: 'I Never Harmed Him'

"Yesterday’s search yielded a number of items, but none appear to be related to the case,” Multnomah County Sherriff’s Lt. Chad Gaidos told KGW-TV.

Kyron was last seen alive by his stepmother, Terri Horman, who told police she dropped him off at Skyline Elementary School to attend a science fair.

Terri Horman was never named a suspect and no arrests have ever been made.

Investigators have continued to work the case, which has always remained active, authorities said.

The Kyron Horman case is near and dear to our hearts, and it is an open case,” Gaidos said. “Yes, it’s seven years old but still we’re looking at it actively.”

Read: When Babies Disappear Without a Trace: 'Until I See a Body, I'm Going to Believe He's Alive'

Authorities have quietly conducted searches in connection with the Horman investigation, with search and rescue crews reportedly combing the area as recently as March and April.

The searches haven’t been based on any new information, but have included a look at areas that were not previously searched.

“We want to ensure we leave no stone unturned,” Gaidos said.

“Being a parent, it’s one of those things. A child has gone missing, and went missing in our neighborhood, and our area,” Gaidos continued. “We’re going to do everything we can. We are not going to give up. And we’re going to continue to actively search for Kyron until he’s found."

Watch: Father Charged with Murder of Son After He Claims Boy Went Missing