A man killed his partner and two children before taking his own life by jumping under a lorry.

The incident took place in the city of Tres Arroyos, Buenos Aires Province, Argentina, on Wednesday, 4th June.

Police identified the man as Fernando Dellarciprete, 42, who worked as a cargo driver.

His partner Rocio Villarreal, 39, was found dead in their home on Larrea Street.

Picture shows Rocío Villarreal y Fernando Dellarciprete with children, undated. He stabbed her to death, killed their children and committed suicide in Tres Arroyos, Argentina. Note: Private photo taken from social media. (Newsflash/NX)

According to the local prosecutor's office, she had been stabbed and later hanged.

Investigators said Dellarciprete then picked up their two young sons, named as Tiziano and Francesco, from school and drove off.

He drove a white Renault Duster and later crashed the vehicle into a hill.

He was apparently attempting to kill himself and his children, but when that failed, he dragged the kids of the vehicle and drowned them in a nearby ditch, according to investigators.

Picture shows Rocío Villarreal y Fernando Dellarciprete with son, undated. He stabbed her to death, killed their children and committed suicide in Tres Arroyos, Argentina. Note: Private photo taken from social media. (Newsflash/NX)

Afterwards, Dellarciprete was struck and killed by a lorry after he threw himself into the path of the vehicle.

Police are treating the case as a femicide, followed by the murder of the children and the perpetrator’s suicide.

(MJ Leidig/newsX)