Authorities say a former top Bureau of Land Management official has been arrested in Nevada on charges of sexually assaulting a 13-year-old girl.

Ronald Wenker was arrested Tuesday in Reno by Washoe County sheriff's deputies. He remained jailed without bail Wednesday on two felony counts each of sexual assault and lewdness with a child under 14.

The 64-year-old Wenker was named head of the BLM office in Reno in 2005. Before that he held a similar post in Colorado, and worked in several states around the West.

In 2009 he temporarily served as acting director for the federal agency in Washington, D.C. He retired last year after a 40-year career with the BLM.

The sheriff's office says Wenker's arrest followed accusations by a young girl that he had been molesting her since 2007.

Jail officials did not have an attorney listed for Wenker, and a telephone message left at Wenker's home wasn't immediately returned Wednesday.