Authorities may be zeroing in on a Colorado landfill in the continuing search for Kelsey Berreth, who is believed to have been murdered by her fiancé after she vanished on Thanksgiving Day.

Investigators contacted the Waste Management of Colorado about possibly searching Midway landfill in Fountain, located 20 miles southeast of Colorado Springs, FOX31 reported.

Kelsey Berreth, 29, was last seen at a supermarket in Woodland, Colorado on Thanksgiving Day. (Woodland Park Police Department)

"The Colorado Bureau of Investigation contacted Waste Management of Colorado regarding a potential search at Midway Landfill and we are cooperating fully," a Waste Management spokesperson said in a statement to FOX31.

COLORADO MOM KELSEY BERRETH MISSING SINCE THANKSGIVING: A TIMELINE OF EVENTS

The spokesperson said further inquiries should be forwarded to the Fourth Judicial District Attorney's Office.

A spokeswoman confirmed to ABC News that the search inquiry was related to Berreth’s disappearance.

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Berreth was presumed murdered in December after investigators uncovered information that linked her fiancé, Patrick Frazee, to her death and disappearance. The 29-year-old mother was last seen on surveillance video on Nov. 22 entering a Safeway grocery story in Woodland Park with her 1-year daughter Kaylee. Frazee and Berreth shared custody of the child.

Although Berreth's body has not yet been located, Frazee was arrested and charged with first-degree murder, first-degree felony murder and three counts of solicitation to commit first-degree murder.