Chelsea Ireland and Lukasz Klosowski were allegedly killed by his father. Here's everything we know.

On Saturday evening, a young couple gathered with family on a property in Mount McIntyre, in South Australia.

By the end of the night, they were dead.

Lukasz Klosowski and his partner Chelsea Ireland, both 19, were allegedly killed by Lukasz' 46-year-old father Pawel Klosowski.

Domestic violence: The hidden numbers. Post continues below video.

The 46-year-old appeared in Mt Gambier Magistrate's Court on Monday charged with two counts of murder.

An interim suppression order lasting three days was imposed on his identity, with defence lawyer Dylan Walsh saying it was required to protect the identity of the man's three stepchildren, who are under the age of 14.

Two of the children witnessed the shooting, the court heard.

That suppression order has now lapsed.

UNMASKED: This is Pawel Klosowski... the 46y/o man accused of shooting dead his 19y/o son and his son's girlfriend Chelsea. He was charged with 2 counts of murder on Sunday but his identity was protected by the court, at his request, until now. @9NewsAdel pic.twitter.com/lP48OGI0Js

— Natarjsha Kramer (@NatarjshaKramer) August 27, 2020

Chelsea and Lukasz were found dead from apparent gunshot wounds at about 11:30pm Saturday night.

Police were called to the property where they arrested the older man without incident.

"[Police are] treating this as an incident where unfortunately the father is alleged to have killed his son and we understand that the female involved is the partner of the son,"  Detective Inspector Campbell Hill told reporters at the scene on Monday.

He told media the couple, who were both university students in Adelaide, had travelled to the property for a family event.

"It's a tragic event and the impacts of this will not only be felt for the particular families involved, and the associates and the relatives, but also for the southeastern community," Inspector Hill said.

Those close to the family told The Advertiser Lukasz had only reconnected with his truck driver father - who spells his first name as Paul on social media - in recent years.

"Two beautiful young kids."

Chelsea's father Greg told 9News his daughter and her boyfriend were "two beautiful young kids, both good kids, have been taken too early in really unfortunate circumstances".

Chelsea Ireland at her 18th birthday. Image: Facebook. 

The young couple met on a school trip to Vietnam. Chelsea attended St Mary's College in Adelaide, and Lukasz was a student at Christian Brothers College.

St Mary's College principal Clare Nocka said the school community was "shocked and devastated" to learn of its ex-student's death.

"The staff community remembers Chelsea as a bright and engaged young woman who was connected with her community and embraced all elements of school life," she said.

Christian Brothers College principal Daniel Lynch said his school community was also devastated.

"Students from the class of 2018 have rallied together to support each other as they grieve over the loss of their 'brother'," he said.

"We will be reaching out to them in the days ahead to provide an opportunity for them to share their memories and stories of Lukasz, and in particular his love for his friends and for his school."

Image: Instagram.

Children's charity Puddle Jumpers Incorporated, where Chelsea volunteered, wrote a tribute on Facebook, saying "this beautiful young couple had their entire lives ahead of them.

"We can't begin to imagine how this must be rocking the entire worlds of their families and close friends. You are all in our thoughts and prayers, sending you so much love.

"Chelsea was a beautiful kind hearted volunteer you will be very much missed by all at Puddle Jumpers too."

In 2016, she was interviewed by the ABC after she cut her hair and raised $1000 for a cancer patient.

Chelsea was studying a Bachelor of Mechanical Engineering at Adelaide University this year and Lukasz was studying journalism.

Friends of the couple have been remembering them in social media tributes.

"The ongoing legacy of friendships and love that [Chelsea] and Lukasz left will not be forgotten," one friend wrote.

"So blessed to have known you both. Gone way too soon but the infectious happiness you both radiated will live on."

Another friend said" "This just isn't fair you were taken away from us like this."

A friend of Lukasz, nicknamed Wu, said they "never thought I'd be writing this."

"Absolutely speechless… from pulling me through group oral presentations, waiting for that substitute teacher to mispronouncing your name and getting on the beers for the first time, memories that will live with me forever.

"You may be gone but you are not forgotten."

Another friend urged others to make sure their friends knew how much they were appreciated.

"Take a second to make sure your mates know you love them because you never know when it can be too late to tell them again," he said.



No bail application was made for the alleged offender. He was remanded in custody to appear in court again in December.

If this post brings up any issues for you, or if you just feel like you need to speak to someone, please call 1800 RESPECT (1800 737 732) – the national sexual assault, domestic and family violence counselling service. It doesn’t matter where you live, they will take your call and, if need be, refer you to a service closer to home.

-With AAP.

Feature image: Instagram.