LEOMINSTER — Timothy Record, 20, is being held without bail after pleading not guilty Wednesday to fatally stabbing his older brother who allegedly assaulted him during a fight over home internet bandwidth.

Record was arraigned on a murder charge wearing pajama pants and a blazer in Leominster District Court for the death of 23-year-old Nathan Record.

Judge Mark Noonan accepted Record’s not guilty plea and ordered him held without bail.

Witnesses said what started as a verbal argument before 7:30 p.m. Tuesday turned physical when the victim, Nathan Record, started punching his younger brother Timothy Record in the head, according to a report of the incident filed by state police.

“A verbal argument escalated into a physical confrontation over the use of digital devices which overwhelmed the internet bandwidth,” according to a report from state police.

After the initial altercation, Nathan went to his room, shutting the door behind him, while Timothy retrieved “knives” from the kitchen, according to the report.

The younger Record “confronted” his brother, who was stabbed in the chest and found by police alive but bloodied at the top of the stairs inside the family’s 20 Lake Shore Drive home at around 7:30 p.m.

Nathan Record died of his injuries at HealthAlliance Hospital later that night.

Interim Police Chief Michael Goldman said officers have been called to the home in the past to mediate fights between the two brothers.

The Record brothers lived at the home, which is located in a quiet neighborhood along Lake Samoset, with their mother and stepfather, Defense Attorney Blake Rubin said.

After the arraignment, attended by several family members who declined to speak to the media, Rubin told reporters his client is “upset, as expected” with the events that led to his brother’s death.

Rubin would not discuss the specifics of the case or his client’s mental state.

“The family’s in mourning at this point,” he said. “It’s very sad, very tragic.”

Timothy Record is due back in court for a status report hearing Oct. 6.