GRAND ISLAND, Neb. (AP) — The mother of a 5-year-old girl who drowned at a Grand Island water park has filed a claim for more than $1 million against the city.

The claim by Dumale Bariyiga, of Lincoln, says lifeguards on duty July 18 at Island Oasis Water Park were negligent.

Under Nebraska law, people who want to sue a municipality first must file a claim and wait at least six months before filing a lawsuit.

Hall County Attorney Jack Zitterkopf has said Nubari Koffree’s drowning was an accident. Last week city officials said city personnel followed proper procedures that day.

Nubari was with her mother at the water park and was found in the wave pool area.