A Utah mom described by pals as positive and caring shot and killed her two young daughters before turning the gun on herself the same day her fiance packed up his belongings and moved out of her house, authorities said.

Kyler Ramsdell-Oliva, 32, killed her pretty blonde daughters, Kenadee Oliva, 13, and Isabella Oliva, 7, Tuesday evening in their home in Syracuse, a town on the Great Salt Lake about 25 miles north of Salt Lake City.

Cops didn’t name the fiance, but said they had been to the home before on domestic calls.

“We were there the night before,” a police spokesman said. “There was a civil issue. They had a fight and he came to pick up his property.” Neighbors said they saw the man loading boxes into a U-Haul truck earlier Tuesday.

Neighbor Joe Peterson came home just as cops were showing up and told the Standard-Examiner newspaper the fiance – who had also just arrived to gather the last of his belongings – looked distraught.

”Why do that?” he kept asking, according to Peterson.

Peterson’s wife Karlene had called the police to report the gunshots.

Cops interviewed the fiance but ruled him out as a suspect.

Bryan Smith, a friend of Ramsdell-Oliva, called her as a “great person” and was stunned by the senseless tragedy.

“I just thought Kyler was one of the most excitable, vibrant, fun persons I’ve ever known,” Smith told the paper. “This really surprises me and shocks me to hear this news.”

The younger girl was a first-grader at Syracuse Elementary School and the older an eighth-grader at Syracuse Junior High School.

Friends mourned and searched for answers on Kyler’s Facebook page.

“My dear Kyler… help me friend, now from heaven.. how do I explain this to my children?? Who spent the night at your house, watched and grew with your babies….. how do I explain this tragedy kyler?? You were so full of positive advice in life… what do you have to say in death???” asked Sabrina Edwards Ridley.

“Ky what the heck….this really sucks I pray for you and your girls,” added Kari Castañón.

The killings came only a day after a distraught Florida mom fatally shot her two teenage children before turning the weapon on herself in another tragic murder suicide.

Jennifer Berman, 48, gunned down her 16-year-old son Alex and 15-year-old daughter Jacqueline before killing herself on Monday.

Her ex-husband, Richard Berman, said in a 911 call that the woman had sent messages to him and others about the impending crime.