Here is the latest Iowa news from The Associated Press at 3:00 a.m. CDT

UNDATED (AP) — Federal regulators have handed a victory to corn farmers by refusing to allow a group of petroleum refiners in 14 states to forego requirements to blend ethanol into the gasoline they make. Members of Congress from farm states have heavily lobbied President Donald Trump to reject the waiver requests for months. Those representing oil producing states supported the waivers which were originally designed to help small refineries but were also granted by EPA in recent years to larger refineries. The decision comes 50 days before the presidential election in which Trump needs support of farmers to help carry several Midwest states again.

DES MOINES, Iowa (AP) — Law enforcement authorities say a 16-year-old died and another was injured when they were shot while trying to rob a group of people in Des Moines. Police say 16-year-old Liem Deng and another 16-year-old were armed with handguns when they tried to rob the group early Monday on the city’s north side. An adult man in the group drew his gun and fired several times at the two teens. Police say the man had a concealed carry permit for his gun. After consulting with the Polk County Attorney’s Office, the incident was ruled self-defense and no charges will be filed.

SERGEANT BLUFF, Iowa (AP) — Iowa authorities have ruled the cause of death of a 66-year-old northwest Iowa man as undetermined after initially investigating it as a homicide. David Davenport died in October after tenants on his property found him injured inside rental property near his home in Sergeant Bluff. Authorities became aware of his death two days later, when a fire damaged his home on the property. Authorities ruled his death a homicide after a preliminary autopsy. Investigators later determined the house fire was accidental. Earlier this month, after further reviewing all the evidence, the Iowa Medical Examiner ruled the cause of Davenport’s death was undetermined.

IOWA CITY, Iowa (AP) — An Iowa judge has voided absentee ballot requests in Johnson County, where the county auditor had mailed 92,000 of the forms to voters with personal information already filled in. It’s the third county in Iowa to have the ballot request forms voided after the campaign of President Donald Trump and state and national Republican Party groups challenged the county election officials. Judge Ian Thornhill sided with the Trump campaign in the Johnson County case on Saturday. He earlier ruled similarly in a Linn County case, and Judge Patrick Tott also found in favor of the Republicans in a Woodbury County case. Those rulings voided about 64,000 requests for absentee ballots