Police: Suspect in abduction of 2 girls found dead

This photo provided by The Iowa Department of Public Safety shows Kathlynn Shepard, 15. Authorities said Tuesday, May 21, 2013, a man suspected of abducting Shepard and a 12-year-old girl from a bus stop in central Iowa has been found dead, but a search continues for Shepard. Authorities said the 12-year-old girl was able to escape and ran to a nearby rural residence for help. (AP Photo/Iowa Department of Public Safety)

DES MOINES, Iowa (AP) — A massive search was underway Tuesday for a 15-year-old girl abducted from an Iowa bus stop, after authorities said a man who is suspected of taking her and another girl was found dead.

Dozens of federal, state and local law enforcement are searching by air, land and water for Kathlynn Shepard. She and a 12-year-old girl were taken from a Dayton bus stop Monday afternoon after accepting a ride from a stranger. The younger girl was able to escape.

The Iowa Division of Criminal Investigation said at a Tuesday news conference that the body of 42-year-old Michael Klunder was found Monday night with a red Toyota Tundra pickup at a rural property northeast of Dayton, about 60 miles north of Des Moines. His cause of death is under investigation.

Klunder is listed on the state's sex offender registry, and he spent several years in prison on kidnapping charges, prison records show. Authorities said he lived and worked in the area.

Kathlynn's name and photo are being released in an effort to find the teenager alive, said Jessica Lown with the Iowa Department of Public Safety.

"They're continuing to search for the girl under the assumption that she is still alive because right at this point in time we don't have information indicating otherwise," Lown said. "That's the way these things work for all missing children and missing person cases. We search until we find them."

Klunder was suspected of abducting the girls on Monday. The 12-year-old girl, who has not been identified, told investigators she and Kathlynn had accepted a ride from a stranger who took them to an agricultural facility. She was able to escape and run to a nearby rural residence for help, DCI Director Chari Paulson said during the news conference.

The girl was taken to a Fort Dodge hospital and released. Authorities haven't said what relationship the girls have to one another.

Authorities said the abduction spanned several hours, with Klunder's body being discovered nearly four hours after the girls were taken.

Poor weather and darkness delayed an extensive search Monday night for Kathlynn that covers up to 100 square miles of mostly rural lands, according to Lown.

With the onset of daylight, authorities scoured fields and wooded areas with the help of K-9s and volunteers. Airplanes equipped with heat-activation technology have been deployed.

"The response by volunteers has been outstanding," Paulson said.

The abduction comes less than a year after the high-profile case of two abducted cousins in Evansdale, about 110 miles east of Dayton. Lyric Cook and Elizabeth Collins disappeared while riding their bikes last July. Hunters found their bodies in a remote, wooded area in December.

Kathlynn is described as being 5-feet-6-inches and 160 pounds. She has blond hair, blue eyes and braces. She was last seen wearing jeans, a gray hooded sweatshirt and a Minnesota Vikings baseball cap.

Authorities are asking the public for information about any interactions with Klunder, as well of any sighting of his pickup between 3 p.m. and 8 p.m. Monday.