Jayme Closs, 13, from Wisconsin, found alive months after her parents were shot dead

A 13-year-old girl form Wisconsin who disappeared after her parents were discovered shot dead in their home three months ago has been found, according to police.

Jayme Closs was found dirty but alive after fleeing her captor in a remote community in the US state.

Authorities said a man, who has not been identified, was in custody in connection with the case.

Jayme was reported missing after the bodies of her parents, James Closs, 56, and his wife Denise, 46, were found on October 15.

Barron County Sheriff Chris Fitzgerald speaks during a news conference about 13-year-old Jayme Closs who had been missing since her parents were found dead in their home in Barron. (AP)

Her disappearance sparked massive searches with 1,500 volunteers scouring the woods and fields in suburban Minneapolis and an offer of $25,000 (£19,620) posted for her safe return.

Jayme was found after she knocked on the door of a resident of the town of Gordon, about an hour’s drive from the Closs home.

She was described as skinny and dirty with matted hair and wearing shoes that did not fit, the Minneapolis Star Tribune reported.

"This is Jayme Closs! Call 911!" said a neighbour who recognised the child, the report said.

Late on Thursday, Barron County Sheriff Chris Fitzgerald announced that Jayme had been found in Gordon.

"A suspect was taken into custody," he added. "We do not have any other details at this time as this is a very fluid and active investigation."

Jayme was taken to a nearby hospital for treatment, but her condition was not immediately clear, with the sheriff asking the media and public to respect the family's privacy