PORTLAND, Ore. - The FBI has joined the search for a 7-year-old boy who vanished after his stepmother left him at his Northwest Portland elementary school on Friday morning.
Detectives on Sunday interviewed parents and students at Skyline Elementary School to glean any possible clues into the whereabouts of Kyron Horman.
The boy and his stepmother, Terri Moulton Horman, attended a science fair at the school early Friday. She last saw him walking down a hallway toward his classroom about 8:45 a.m.
Police say Kyron did not return home on the bus as scheduled and the family called the school. The Multnomah County Sheriff's Office was contacted about 4 p.m.
Authorities have been searching the school and the surrounding area since then. The FBI has dispatched its Child Abduction Rapid Deployment Team.
Multnomah County Sheriff Dan Staton said he was "not prepared" to call the boy's disappearance a kidnapping and there were no suspects at this time.
In addition to Multnomah County deputies, Portland, Gresham, and Fairview police, as well as the Oregon State Patrol and Multnomah County Search and Rescue were taking part in the search.
A search of the two miles between the school and Kyron's home did not turn up any clues, police said.
"The mission is the same as last night; that being to locate Kyron Horman," police spokeswoman Lt. Mary Lindstrand said.
The FBI also dispatched a profiler from the FBI's Behavioral Analysis Unit. FBI spokeswoman Beth Anne Steele said in an e-mail that this type of team is often dispatched when a young child disappears, and its presence does not mean that law enforcement has determined the child has been abducted.
Kyron is described as 3-foot-8 and 50 pounds with brown hair and blue eyes. He was last seen wearing a "CSI" T-shirt and dark cargo pants.
Kyron father's Kaine Horman, works at Intel. The boy's mother, Desiree Horman, lives in Medford and came to Portland following Kyron's disappearance.
Relatives were distributing flyers with the boy's picture on Sunday. Authorities also began interviewing students and their families individually at the school.
At a news conference on Sunday afternoon at Brooks Hill Historical Church, Staton said the investigators were working to determine a detailed timeline as to the boy's movements on Friday morning.
In addition to interviews with students and families, authorities were reviewing photos and videos taken at the school that morning at the science fair.
The last photo of Kyron shows the boy smiling in front of his project on the red-eyed tree frog.
Asked if there were any persons of interest, Staton replied: "In this type of situation I think everyone is of interest to us."
Superintendent of Portland Public Schools Carole Smith would not comment on the details of the district's policy for reporting school absences.
"The reported disappearance of a child from one of our schools is unprecedented and deeply troubling," she said.
Smith said a counseling hotline for people in the school district who have questions or concerns will be up and running on Monday morning at 8:30. The number is 503-916-3931.
Anyone who has seen Kyron or knows of his whereabouts was asked to call (503) 261-2847.