Jacob Wetterling's remains found 27 years after his abduction

Discovery provides long-awaited answers to a mystery that has captivated residents

Patty and Jerry Wetterling show a photo of their son Jacob Wetterling, who was abducted in October of 1989 in St. Joseph, Minneapolis (AP)

The remains of Jacob Wetterling, an 11-year-old boy kidnapped from a rural US road nearly 27 years ago, have been found.

The discovery provides long-awaited answers to a mystery that has captivated residents and sparked changes in sex offender laws.

A masked gunman abducted Jacob in October of 1989 near the boy's home in St Joseph, about 80 miles north-west of Minneapolis.

The Stearns County Sheriff's Office confirmed late on Saturday that "Jacob Wetterling's remains have been located" and the Ramsey County medical examiner and a forensic odontologist had identified them.

Additional DNA testing will be conducted and investigators are continuing to evaluate new evidence in the case, the sheriff's office said, adding that authorities expect to be able to provide more details early next week.

A law enforcement official told The Associated Press earlier on Saturday that a person of interest in Jacob's abduction took authorities to a field in central Minnesota last week.

The official said remains and other evidence were recovered and that the remains had been buried.

Jacob's mother, Patty Wetterling, sent a text message to KARE-TV earlier on Saturday, saying that Jacob "has been found and our hearts are broken".

Jacob was riding his bicycle with his brother and a friend on October 22 1989, when a masked gunman abducted him.

Authorities said the man held on to Jacob and told the other boys to run. Jacob had not been seen since, despite extensive searches, tens of thousands of leads and offers of a monetary reward.

No-one has been arrested or charged over his abduction, which led to changes in sex-offender registration laws.

This undated file photo provided by the Sherburne County Sheriff's Office, shows Daniel Heinrich. Heinrich, who authorities have called a person of interest in the 1989 kidnapping, denied any involvement and was not charged with that crime. He has pleaded not guilty to several federal child pornography charges (AP)

But last year, authorities took another look at the case, and were led to Danny Heinrich, a man they called a "person of interest" in Jacob's kidnapping.

Heinrich, 53, of Annandale, denied any involvement in the abduction, and was not charged with that crime.

But he has pleaded not guilty to 25 child pornography charges and is scheduled to go on trial on those counts in October.

The FBI has said previously that Heinrich matched the general description of a man who assaulted several boys in Paynesville from 1986 to 1988.

Earlier this year, Heinrich's DNA was found on the sweatshirt of a 12-year-old boy who was kidnapped from Cold Spring and sexually assaulted just nine months before Jacob's abduction.

Heinrich was questioned by authorities shortly after Jacob's disappearance, but he denied involvement.

Court documents say his shoes and car tyres were "consistent" with tracks left near the site of Jacob's abduction, but could not be ruled an exact match.

The authorities also searched the home where Heinrich lived with his father at the time and found scanners, camouflage clothing and a picture of a boy wearing underwear.

Jacob's abduction shattered childhood innocence for many in rural Minnesota, changing the way parents let their kids roam.

His smiling face was burned into Minnesota's psyche, appearing on countless posters and billboards over the years. Each year, Minnesota residents were asked to keep their porch lights on for Jacob's safe return.

Patty Wetterling always hoped her son would be found alive. She became a national advocate for children, and with her husband, Jerry, founded the Jacob Wetterling Resource Centre, which works to help communities and families prevent child exploitation.

In 1994, Congress passed a law named after Jacob Wetterling that requires states to establish sex offender registries.

Officials with the Jacob Wetterling Resource Centre posted a statement on its website saying they are in "deep grief".

"We didn't want Jacob's story to end this way," the statement said.

"Our hearts are heavy, but we are being held up by all of the people who have been a part of making Jacob's Hope a light that will never be extinguished ... Jacob, you are loved."

Associated Press