Here is the latest Iowa news from The Associated Press at 3:40 a.m. CDT

DUBUQUE, Iowa (AP) — Some Dubuque parents are concerned about the end of an elementary school’s charter status, despite officials saying many of the school’s practices will remain in place. The Telegraph Herald reports that the Dubuque Community School Board voted in January not to renew Prescott Elementary School’s status as a charter school. Officials said they believed the school didn’t see significant improvement in student achievement during its 12 years as a charter.

MAQUOKETA, Iowa (AP) — A Dubuque man charged in the stabbing death of a Bellevue man has pleaded not guilty. The Telegraph Herald reports that 23-year-old Drew Mangler entered a written plea last week in Jackson County District Court. Mangler is charged with first-degree murder in the death of 59-year-old James Remakel. Police found Remakel’s body after being called to a house in Bellevue on Dec. 25, 2016.

DES MOINES, Iowa (AP) — An Iowa maker of wind turbine blades has been fined nearly $155,000 for multiple workplace safety violations. The Des Moines Register reports that Iowa’s Occupational Safety and Health Administration levied the fines against TPI Composites for violations at its Newton plant. The citations support complaints from dozens of former workers who say TPI didn’t properly protect them from dangerous chemicals that caused them severe skin injuries.

DES MOINES, Iowa (AP) — Many cities in Iowa have implemented new restrictions on fireworks a year after the state allowed legal sales for the first time since 1938. Des Moines and Cedar Rapids both banned the use of fireworks after last year’s season. So have other large cities including Davenport, Waterloo, Iowa City, Ames, Dubuque and West Des Moines. Although cities can ban the use of fireworks, they can’t stop firework sales. Officials expect between 700 and 800 retail locations will sell fireworks this year.