A “major development” will be announced Monday in the case of 11-year-old Gannon Stauch, a Colorado Springs-area boy last seen in late January, according to the El Paso County Sheriff’s Office.

The Sheriff’s Office will release new information at a noon press conference, the agency said on Twitter.

Gazette news partner 9News is reporting that Gannon’s stepmother, Leticia Stauch, has been arrested on suspicion of murder as part of the search, but the newspaper has been unable to obtain independent confirmation.

This is a developing story. The Gazette will livestream the press conference on its Facebook page. The press conference is scheduled for noon.

RELATED: Find more information about the search for Gannon Stauch here

Gannon was last seen Jan. 27 by his stepmother, who told investigators that he had walked to a friend’s home nearby. No information has been released on whether the boy made it to the friend’s house.

His disappearance was initially treated as a runaway. Two days later, sheriff’s officials referred to him as a missing and endangered child, which allowed them to call on the resources of the FBI and nationwide missing children organizations.

In the weeks since, the search for the missing boy moved north of the El Paso County border, to southern Douglas County.

Searchers most recently probed an area near Colorado 105 and Colorado 83, the El Paso County Sheriff’s Office said Saturday.

Sheriff’s spokeswoman Jacqueline Kirby did not immediately return voicemails seeking information.

This is a developing story. The Gazette will livestream the press conference on its Facebook page.

RELATED: Find more information about the search for Gannon Stauch here