A Twin Falls man is behind bars after a report to 911 Friday morning about a child falling down stairs turned suspicious.

Nathan D. Mort, 30, was arrested and charged with aggravated battery, according to a Saturday news release by the Twin Falls Police Department.

A call was made to dispatch at about 10 a.m., when the caller said a 2-year-old child had fallen down stairs at an apartment at 2026 Elizabeth Blvd. Paramedics arrived at No. 128, and the child was rushed to St. Luke’s Magic Valley Medical Center and later airlifted to St. Alphonsus Regional Medical Center in Boise in critical condition, according to the release.

Police investigated the incident and arrested Mort on charges of aggravated battery.

Anyone with information about the incident should contact Twin Falls Police at 311 or 735-4357.