Here is the latest Iowa news from The Associated Press at 3:33 a.m. CST

DES MOINES, Iowa (AP) — Government documents and emails show Iowa’s top 4-H leader was fired earlier this year after a proposed policy discouraging discrimination based on sexual orientation or gender was withdrawn. The Des Moines Register reports that it reviewed more than 500 pages of communication that show Iowa 4-H director John-Paul Chaisson-Cárdenas was fired after he fought pressure to drop the policy.

DES MOINES, Iowa (AP) — The U.S. Navy says it has commissioned the USS Sioux City into service. The Navy said in a news release that the combat ship was placed into active service on Saturday at the United States Naval Academy in Annapolis, Maryland. Plans for the USS Sioux City were announced in 2012. It was built at as shipyard in Marinette, Wisconsin.

GUTHRIE CENTER, Iowa (AP) — Preliminary autopsy results show four people who died in a small plane crash in central Iowa earlier this month were suffering from carbon monoxide poisoning. Television station KCCI reports that the Iowa State Medical Examiner’s Office report said all the victims died from “multiple blunt force injuries in the setting of carbon monoxide toxicity.” The crash happened the night of Nov. 9 after plane passengers reported the pilot had had an apparent heart attack.

OSCEOLA, Iowa (AP) — The Iowa State Patrol says a pregnant woman and her 2-year-old stepson have died in a crash in south-central Iowa. Television station KCRG reports that the crash happened Friday evening in Clarke County, about 9 miles south of Osceola. The patrol says 22-year-old Bethannie Kennedy, of Osceola, was driving south on U.S. 69 when she lost control, went sideways and was broadsided by a northbound pickup truck. Kennedy and 2-year-old Michael Dohrn Jr. died from injuries received in the crash.