Jessica McKisick, 33, her daughters Sofina and Natalie Kleemeir, 12 and 14, along with her two unidentified three-year-old boys, shot and killed on Friday in Hartland, Wisconsin 

Connor McKisick – the father of the boys and stepfather of the girls – shot each of them along with their mother, before killing himself and setting the apartment on fire

Their bodies were discovered early on Friday after firefighters were called to their burning apartment on Mansfield Court in Hartland around 5.15am

Police said there was evidence of a liquid accelerant an the scene and police recovered several firearms from the apartment

It took 15 fire departments and nine police departments to put out the blaze and the other three families in the units have been displaced 

Four siblings and their mothers were shot dead inside their Wisconsin apartment after their stepfather set it on fire and then turned the gun on himself.  
Jessica McKisick, 33, and her daughters Sofina and Natalie Kleemeir, 12 and 14, and two unidentified three-year-old twin boys, were shot and killed by Connor McKisick, whom they lived with it. 
The alleged killer Connor McKisick, the father of the boys and stepfather of the girls, had a self-inflicted gunshot wound, Hartland Police Chief Torin Misko said. 
Their bodies were discovered early on Friday after firefighters were called to their burning apartment on Mansfield Court in Hartland around 5.15am. The other tenants in the four-unit building made it out safely.  
Chief Misko said on Monday evening that all victims had single gunshot wound each – suggesting execution style killing. 
He also said there was evidence of a liquid accelerant in the apartment. Police recovered multiple firearms from the residence.

Sofina and Natalie Kleemeir, their younger twin brothers and their mother were all killed inside the home before McKisick set up the arson and turned the gun himself.
‘This is a tragic incident for the family of the deceased, for our first responders and for the Hartland community,’ Misko said.
According to CBS 58, at least 15 fire departments and nine police departments were called to the scene for the blaze on Friday. Photos of the event shows a smoke-stain blackened roof with side paneling completely burned through, leaving a gaping hole on the side of the building. 
The door to the apartment was charred black and bricks were seen crumbling from the side.   
Apartment resident and single mother, Ardita Gashi, says her son Ariel, 13, heard an explosion ‘across the hall’ and immediately ran to wake up his sisters Adela, 15, and Amina, eight. 

‘He rushed them out of the apartment through their back door and lead them by the parking lot to safety where he then called his mom, [who was at work],’ a family friend revealed on GoFundMe. 
‘Everything they had was destroyed by the fire and smoke,’ friend Fjolla Mustafa wrote.  
Natalie’s school Arrowhead High School remembered the teenager, saying in a statement that she was a ‘caring person’ who ‘always had a good-hearted personality for everyone.’ 
Natalie and Sofina’s relative, Samantha Maass, started a GoFundMe to help cover the girls’ funeral.
She wrote: ‘While my cousin Kyle mourns the loss of his children, I want to help raise money for the girl’s funeral. Anything will help, no matter how small or big your donation is.’ Kyle Kleemeir is Natalie and Sofina’s biological father. 

Jessica’s niece Mel Blakeway also started a GoFundMe for the late mother, writing: ‘We are extremely heartbroken over what happened to our family, losing Jessica, our nieces and nephews so suddenly.’ 
‘I’m in complete shock because we just said goodbye to our grandma a couple months ago and now we have to say goodbye to them,’ Mel continued on Facebook. 
Natalie’s friends also set up a GoFundMe. Gabrielle Slowinski called her late friend ‘always kind, funny, and smart.’ 
‘She was a freshman in high school and she had a very bright future ahead of her. She talked fondly of her family and loved them so much. She would always send me pictures/videos of her siblings showing me how cute they were.’  

A former classmate of Jessica’s Cayla Anderson also shared her ‘heartbreak’ on Facebook, writing: ‘Her and I went to St. Paul’s together since we were little up until 8th grade…I am so sad you and your beautiful babies are gone, but I know you are all in heaven together. Rest easy.’ 
A vigil was held for the family in Nixon Park on Friday, where roughly 20 people gathered to remember them. Friends of the two girls were said to be in attendance. 
The other families in the Mansfield Court apartment building have been displaced, according to the Milwaukee Journal Sentinel, and village administrators are collecting gift cards for food and clothing to help them.