The investigation was under way with personnel interviews Friday after a complaint regarding a child was received from the retreat built by jailed polygamist leader Warren Jeffs, the Houston Chronicle said.

Reports from the scene said no decision had been made on removing any children from the ranch and no one had been taken into custody.

The retreat was built by the Fundamentalist Church of Jesus Christ of Latter Day Saints. The congregation, known as FLDS, has been led by the reclusive Jeffs since his father's death in 2002.

In November, Jeffs was sentenced to jail in Arizona as an accomplice on four counts each of incest and sexual conduct with a minor stemming from two arranged marriages.