Authorities are also asking for 2,000 volunteers to help search for evidence on Tuesday.

The volunteers must be able to walk on uneven terrain in or around the crime scene, the sheriff's office said.

This comes after an initial search by 100 volunteers on Thursday. It's not clear if any evidence was found in that search.

\"PHOTO:
Barron County Sheriffs Dept. via AP
PHOTO: Jayme Closs in an undated photo provided by Barron County, Wis., Sheriff's Department. Closs, a missing teenage girl, could be in danger after two adults were found dead at a home in Barron, Wis., on Oct. 15, 2018.
>

The mysterious case began in the early hours of Oct. 15 when Jayme's parents, Denise and James Closs, were shot dead in their home, authorities said.

Police responded to the house after a strange 911 call in which no one spoke. A dispatcher, however, could hear yelling, according to records.

\"PHOTO:
ABC News
PHOTO: Authorities at the home of James and Denise Closs, found dead on Monday in Barron, Wisconsin. Their 13 year-old daughter Jayme Closs was missing.
>

Jayme was believed to be home at the time of the killings but had been abducted by the time police arrived just minutes after the 911 call, according to authorities.

\"Jayme remains missing and endangered and has been added to the top of the FBI’s Missing Persons list, and is currently on digital billboards nationwide,\" the sheriff's department said in a statement Sunday.

.@FBIMilwaukee is seeking information regarding #missing 13-year-old Jayme Closs. If you have info, please contact the Wisconsin Department of Justice Child Abduction Response Team tipline at 1-855-744-3879 or your local @FBI office https://t.co/etpWTWTY9H. pic.twitter.com/WJSJxyNVdX

— FBI (@FBI) October 18, 2018

In the week since she vanished, over 1,300 tips have been submitted so far, and of those 1,100 have been closed, the sheriff's office said.

Thank you to our friends at the Convenience and Newsbreak Networks for broadcasting the message regarding Missing & Endangered 13 yr old Jayme Closs on screens at gas pumps, convenience stores and truck-stops across the nation. Call 1-855-744-3879 with tips #FindJayme pic.twitter.com/x2mkJbn92n

— FBI Milwaukee (@FBIMilwaukee) October 20, 2018

Community members are set to come together at a \"Gathering of Hope\" event Monday night to pray for the missing girl.

\"PHOTO:
Barron County Sheriffs Office
PHOTO: An undated photo of missing 13-year-old Jayme Closs of Barron, Wisconsin.
>
\"PHOTO:
Barron County Sheriffs Office
PHOTO: An undated photo of missing 13-year-old Jayme Closs of Barron, Wisconsin.
>

An Amber Alert has been issued for Jayme. Anyone with information is asked to call the 24-hour tip line at 855-744-3879.

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