More than 400 children have been taken into state custody from a sprawling West Texas compound built by the polygamist leader Warren Jeffs while authorities continue to investigate claims of young girls forced into marriages with older men, authorities said Monday.

Child Protective Services spokeswoman Marleigh Meisner said another 133 women were also taken from the compound. All the women and children are in a shelter in San Angelo, Texas.

"The women wanted to come, they came voluntarily and they have been free to leave at any time," Meisner said.

Meisner said she believes the operation is the biggest of its kind in Texas.

Earlier Monday, Texas state troopers made an arrest in their search of the compound.

A Department of Public Safety spokesman said the person arrested was not Dale Barlow, the man who a 16-year-old girl said had married her.

The spokesman said he had no other details.

The girl's report led authorities last week to raid a 1,700-acre polygamist compound in Eldorado run by the Fundamentalist Church of Jesus Christ of Latter-Day Saints.

The girl said she had a baby at 15 and authorities were investigating whether she had been abused.

Texas law prohibits girls younger than 16 from marrying, even with parental consent.

Authorities have removed more than 220 women and children from the compound but haven't located the girl who made the report.

Officials were still trying to figure out whether the girl is among those who were taken from the compound.

Monday was the fourth day of searching at the compound in west Texas.