LYMAN, Maine — The Maine Attorney General’s Office continued an investigation Sunday into the police shooting death of a Sanford man.

A sergeant with the York County Sheriff’s Office shot and killed 22-year-old Andrew Landry on Saturday night in Lyman after he continued to advance with two knives despite having been struck by a Taser, said Brian MacMaster, director of investigations for the Attorney General’s Office.

The incident occurred around 8:30 p.m. at 13 Faucher’s Lane. Two officers responding to a call for assistance with “an emotionally disturbed person” met Landry and two other people, according to a sheriff’s department new release.

MacMaster said in an interview Sunday that the two people with Landry were his aunt and her adult daughter. He said he did not know their names.

MacMaster said Landry brandished two stainless-steel kitchen knives about 6 to 8 inches long. After moving the two women to a safer part of the home, the deputies attempted to disarm Landry, MacMaster said.

Sgt. David Chabette fired a Taser at Landry, who appeared unfazed by the burst of electricity, MacMaster said.

“We know that it did strike him,” he said. “We also know, very rarely but on occasion, that the Taser doesn’t have the effect that one would think that it would. Whether it malfunctioned or just didn’t have the effect, we don’t know.”

When Landry continued to threaten the deputies, Sgt. Kyle Kassa used his gun on Landry, killing him. Kassa was placed on paid administrative leave, as is customary pending the completion of an investigation into a shooting death by police.

Neither deputy was injured.

MacMaster said investigators remained at the residence — a white, single-story modular home with a covered well in the front yard and an American flag displayed from the porch — until 7 a.m. Sunday.

“We were there all night processing the scene,” he said.

On Sunday afternoon, the snowy private lane off Huff Road was quiet, with only a strand of yellow police tape wrapped around the trunk of a tree across the street to signify anything out of the ordinary. Curtains were pulled across a picture window. A man who answered the door declined to comment.

Lyman town records list the owner of the property as Gaetan Faucher, but the name on a numbered mailbox at the entrance to the home reads “O’Brien.”

According to MacMaster, Landry lived with a relative in Sanford and may have had prior interactions with police.

“There seems to be an indication of that,” MacMaster said, “but we haven’t gotten that far with it. It will take us awhile to pull it all together.”

Distributed by McClatchy-Tribune Information Services.