The Washington County Attorney's Office is investigating, but it was not immediately clear Tuesday if any charges might be filed, said County Attorney Brock Belnap.
The woman had been living with her parents, and ran to the home of Willie Jessop, former spokesman for the Fundamentalist Church of Jesus Christ of Latter-Day Saints, who currently supports a rival seeking to replace Jeffs as prophet, said Isaac Wyler, a former sect member who still lives in the community.
The sheriff's deputies helped diffuse what had become a standoff with FLDS men outside Jessop's office, Wyler said, adding that the woman was taken to a shelter.
Jessop declined to provide details about the situation.
"It's all about the welfare of a girl who sought help," Jessop said. "We're keeping this focused on what's in the best interest of the young lady."
Jeffs, 55, has at least 78 plural wives, according to court documents. In August, he was convicted in Texas of sexually assaulting two of those wives when they were ages 12 and 15. According to evidence prosecutors presented at trial, Jeffs "trained" his wives to be comfortable naked and participate in group sex. He frequently moved them to "lands of refuge" like the group's Yearning for Zion Ranch in Texas or to "houses of hiding" scattered throughout the West.
Very few, if any, of the women he has taken as wives are known to have left the community.