The mother of a boy who accidentally shot and injured his younger sister with a rifle at their southwestern Manitoba home in 2011 has been sent to jail.

Krista Lachapelle was sentenced on Tuesday to eight months in jail and 18 months of probation, family members confirmed to CBC News.

She is currently behind bars at the Women's Correctional Centre in Headingley, Man., according to family members.

The shooting happened on Nov. 26, 2011, at the Lachapelle family farm house near Elgin, Man.

Lachapelle's husband, Dan Lachapelle, told CBC News shortly after the incident that their son — who was five years old at the time — had gained access to a .22-calibre rifle, loaded the firearm with a bullet, and shot at a wooden door.

The bullet went through the door and struck his sister, who was four years old.

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In a CBC interview on Nov. 28, 2011, Dan Lachapelle said his firearms and ammunition were usually kept in secure closets, but he had taken the guns out for target practice and didn't put them back in their locked spots. (CBC)

The girl was airlifted to Winnipeg for surgery. She was recovering within weeks of the incident.

RCMP have said the shooting was likely an accident.

In an interview on Nov. 28, 2011, Dan Lachapelle said his firearms and ammunition were usually kept in secure closets, but he had taken the guns out for target practice and didn't put them back in their locked spots.

He also said the children's mother had been moving the firearm in question for safe storage when she stopped to change another child's diaper.

"My wife blames herself because she was in the house at the time, and I was at work," he said. "I told her that those are my guns. I know the laws, I know the rules."