NASHUA - A 14-year-old boy is under arrest for allegedly sexually assaulting a toddler earlier this week.

Police say the 3-year-old male victim told a family member about the incident, which was then reported to authorities around 10:30 a.m. on Tuesday.

“The child was brought to an area hospital where he was treated and later released,” said Lt. Francis Sullivan in a statement.

Detectives from the department's Youth Services Division immediately began investigating. It was determined that the 14-year-old boy, whose name is being withheld because of his age, was allegedly responsible for the sexual assault.

Police say the teen knew the victim, but did not elaborate on their relationship. The older boy was arrested a few hours later and charged with aggravated felonious sexual assault as a delinquent child, a felony.

A court judge has ordered that the teen be detained at an area juvenile facility pending an upcoming court date at Nashua District Court.