Here is the latest Iowa news from The Associated Press

DAYTON, Iowa (AP) — Authorities plan to resume their search by river for a teenager in central Iowa abducted last month. Dayton Police Chief Nick Dunbar says the state Department of Natural Resources will deploy boats on the Des Moines River this week to search for 15-year-old Kathlynn Shepard. Authorities halted their search for Kathlynn last week, which included more than 250 square miles in the Dayton area. Flooding also affected their efforts.

BUFFALO CENTER, Iowa (AP) — Agriculture officials have revoked the permit of a dairy plant in northern Iowa because of food safety concerns. An administrative law judge ruled yesterday in favor of the state Department of Agriculture and Land Stewardship, which revoked the dairy plant permit for Meinders Farm Fresh Dairy in Buffalo Center. The company must cease all operations and sales.

WATERLOO, Iowa (AP) — Authorities in Waterloo are investigating the vandalism of 11 police squad cars. The Waterloo Police Department discovered broken windshields on the Ford Crown Victoria vehicles on Monday. They were parked by city gas pumps on Black Hawk Street.

DAVENPORT, Iowa (AP) — A Davenport man has pleaded not guilty to charges in connection with the assault of a man at a county courthouse. Court records filed last week show 46-year-old Jimmy Lightner pleaded not guilty to willful injury causing bodily injury and going armed with intent. He also is charged with an aggravated misdemeanor of interference with official acts causing bodily injury.