SIOUX CITY, Iowa (AP) -

A 54-year-old registered Iowa sex offender has been given nearly 30 years in prison for child pornography and enticing a child into sexual activity.

Timothy Koenck, of Fenton, was given 355 months earlier this month after pleading guilty to several charges in September. He was sentenced in U.S. District Court in Sioux City.

Koenck also was convicted in 2002 of enticement of a minor and possession of child pornography.

Koenck must serve 10 years of supervised release after leaving custody.