The FBI announced Wednesday that remains found during last week’s grid search for fugitive father Travis Decker were determined to be non-human.

On August 25-26, officials discovered bones while searching Washington campgrounds in connection with the manhunt for Decker, who is accused of killing his three young daughters. These bones were analyzed and deemed non-human by W. Mike Herrington, the special agent in charge of the FBI Seattle field office, according to a statement released Wednesday.

“During the search, personnel recovered multiple bones, including those needing further examination to identify if they were animal or human,” Herrington stated. “Central Washington University has evaluated the bones and confirmed they are not human.”

The search for Decker commenced on June 2, after he did not return his daughters — Paityn, 9, Evelyn, 8, and Olivia, 5 — to their mother following a scheduled visitation. The children’s bodies were found near Rock Island Campground along Icicle Creek with bags over their heads. Autopsies revealed they died by suffocation, with their deaths being ruled homicides.

This undated photo provided by Whitney Decker shows Paityn, Olivia and Evelyn Decker.  (Whitney Decker via AP)

The U.S. Marshals Service is offering a reward of up to $20,000 for information leading to Decker’s capture. Authorities warn that he should be considered armed and dangerous. 

The Chelan County Sheriff’s Office and the Wenatchee Police Department did not immediately respond to Fox News Digital’s request for comment.