Victor Marin Del Sol, who lived and worked in Dublin for over a decade, strangled his two young sons to death before lying in wait for his partner, Ewelina Szwarc. 

A Spanish-born man who had been living and working in south Dublin for over a decade is believed to have murdered his two young sons and partner before taking his own life in a horror murder-suicide. 

Victor Marin Del Sol had traveled to Poland days before Christmas 2018 to visit his former partner Ewelina Szwarc and their three children. Szwarc, a Polish native, had moved back to Poland with the couple's children, Maria Victoria, 11; Oskar, 9; and Christian, 7; while Marin Del Sol remained in Ireland working as a waiter. 

The father-of-three was staying with his two sons at their apartment while Szwarc and their daughter stayed a couple of blocks away. It's believed that shortly after his arrival Marin Del Sol strangled his two young sons in their sleep and waited for the return of their mother. It is reported that he then stabbed Szwarc to death before taking his own life. 

Their 11-year-old daughter fled from the apartment and raised the alarm. 

Read more: Tragedy as Irish American boy, 12, stabs his mother, kills his twin sister in Connecticut

Murdered Polish woman Ewelina Szwarc had spent years living and working in Dublin.

Murdered Polish woman Ewelina Szwarc had spent years living and working in Dublin.

The two schools in Dublin that the children attended have expressed their shock at the tragic deaths of the past pupils. 

"Oskar was a lovely child. He was a nice boy. He spoke Polish and Spanish and had little English, but he was developing well in the language and integrating well," Ballyroan Boys School principal Des Morris said.

"It is shocking and sad. You can't fathom it."

The manager at the Little Caesars where Marin Del Sol worked has also expressed his shock. 

"Everybody loved Victor. He was an amazing guy. He really loved people," he said.

"He told us he was going to Poland before Christmas for a few days to see the children.

"It's terrible. We could never have imagined that Victor could do such a thing."

A GoFundMe has now been established by the Irish former colleagues of Ewelina Szwarc for her surviving daughter Maria Victoria. You can donate to the campaign here.  

Read more: Irish sports star accused of rape and assault arrested and released

Victor Marin Del Sol with Ewelina Szwarc.