Here is the latest Iowa news from The Associated Press at 3:50 a.m. CDT

DES MOINES, Iowa (AP) — Police say a Des Moines mother has been arrested after officers found her three children alone outside their home, including one naked and covered in feces, and another with a full diaper. TV station KCCI reports that a 4-year-old boy was left in charge Monday of his 2-year-old and 1-year-old siblings. County records say Destinee Miller remains jailed Tuesday on child endangerment charges.

DES MOINES, Iowa (AP) — Animal rights and free speech organizations have sued the state of Iowa challenging a 2012 law that made it illegal to get a job or gain access to a livestock farm through misrepresentation to conduct an undercover investigation. Animal rights activists often get a job to secretly videotape abusive behavior at chicken, pig and cattle farms and release it to the public. The lawsuit was filed Tuesday in U.S. District Court in Des Moines.

IOWA CITY, Iowa (AP) — Iowa Secretary of State Paul Pate’s office has corrected multiple errors in its guidance on the number of signatures that some Congressional candidates must gather to get on the ballot. For months, the office’s website misinformed potential candidates in Districts 2 and 3 about minimum signature requirements. A spokesman says the errors were corrected last week after they were pointed out by The Associated Press.

DANVILLE, Iowa (AP) — Crews are ready to begin an extensive $3 million restoration of Lake Geode in southeast Iowa. But the first task of opening pipes to drain the popular lake is proving to be a challenge. The Hawk Eye reports the plate covering the pipe may be stuck because of pressure, friction or being tied down. Divers may try to cut a hole in the plate or the reinforced concrete pipe. Once the plate is removed, water will flow to the other side of the dam and into Cedar Creek.