A MOTHER-OF-FOUR executed her three young daughters before turning the gun on herself in a horrific murder-suicide.

Tranyelle Harshman, 32, left another daughter fighting for her life in intensive care after her terror shooting spree at the home on Monday.

The mom, from Wyoming, opened fire on her four children before calling the cops to say she was going to shoot herself, according to the Big Horn County Sheriff’s Office.

Her dead daughters were aged just two, two, and nine.

A seven-year-old, named as Olivia, was found alive but was rushed to a hospital in Salt Lake City for immediate care, according to KTVQ.

Olivia is fighting for her life after she suffered a “severe traumatic brain injury”.

The mom told emergency services that two of her daughters were in their cribs and the other two were in their bedrooms downstairs.

She also reportedly told cops they would find her dead in the upstairs bedroom.

The alarm was also raised after reports of gunshots at the property, in Byron, were made.

Police said: “The dispatcher pleaded with the female caller over the phone for the female caller to remain on the line until responding suits arrived.

“The female caller stated multiple times that she could not do that and that it was too late.

“Multiple attempts to keep her on the line failed and the call was disconnected.”