A ninth-grader at Assumption High School has been arrested in the Thursday night stabbing death of a 10th-grade classmate and neighbor, Assumption Parish Sheriff Mike Waguespack said Friday.

The unnamed 15-year-old was booked on a count of second-degree murder in the death of Eric Myles Jr., another 15-year-old, who according to information gained during the investigation, had developed a strained relationship with the other teenager that had resulted in “an exchange of words at school one day,” Waguespack said.

Reports also indicate the teenagers had argued and fought in the past couple of weeks in the neighborhood, Waguespack said.

The sheriff said deputies received a call at 6:12 p.m. Thursday from a woman who said her son told her in a telephone conversation that he had just stabbed someone.

The teens apparently took their troubles to Daggs, a residential street in the community known as Dorseyville, the sheriff said.

Waguespack said the teens were fistfighting and then one juvenile backed away and pulled out a knife before stabbing the other.

The victim ran about 300 feet and collapsed, Waguespack said.

The suspect is being held at the St. James Parish Youth Center. Waguespack said the teen confessed to the stabbing Myles with a kitchen butcher knife, which was recovered from his residence.

Additional security and deputies were sent to Assumption High School Friday morning as a precautionary measure. Waguespack said school officials have arranged for counselors to talk to students affected by this homicide.

The victim’s body will be sent for autopsy by the Assumption Parish Coroner to determine the exact cause of death, the sheriff said.