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

LeCLAIRE, Iowa (AP) — Police in eastern Iowa say they have arrested a suspect in the armed robbery of a convenience store _ the ex-boyfriend of the clerk who was held at knifepoint. LeClaire police say officers were called Thursday night to a QC Mart for a robbery in progress. Arriving officers say the suspect had fled, but that the cashier identified him as her ex-boyfriend, who was arrested in Davenport on Friday.

WATERLOO, Iowa (AP) — Officials say heavy rainfall has overwhelmed Waterloo’s sewer system, letting untreated sewage reach rivers and streams. The Waterloo-Cedar Falls Courier says Waterloo Waste Management Services reported three locations where sewage escaped manholes and six more spots where workers bypassed sanitary sewer lines into street drains to prevent other spills. A city official says the untreated wastewater is heavily diluted, owing to the nearly 8 inches of rain in the past week.

OTTUMWA, Iowa (AP) — An 18-year-old man already facing a murder charge has been accused of another shooting. Police have charged Jacob Heckethorn with attempted murder, saying he shot Clifford Collett Sr. on Aug. 16 in Ottumwa. Wapello County District Court records say Heckethorn already has pleaded not guilty to charges of first-degree murder and attempted murder in the original case.

DES MOINES, Iowa (AP) — Enrollment is down at three of Iowa’s public universities, but officials say the decline is intentional at two of the schools. The Des Moines Register reports that overall enrollment at University of Iowa, Iowa State University and University of Northern Iowa dropped 2.2 percent this fall to about 79,600 students. The Iowa Board of Regents says the first two schools want more manageable enrollment levels as officials focus on retaining students and increasing graduation rates.