Six people were killed in a knife attack by 40-year-old man in a mall in Sydney, Australia on Saturday. Out of the six fatalities, five were women. Authorities further revealed that the majority of the 12 victims who survived the injuries were also women. Now, the father of Joel Cauchi, Adrew Cauchi has revealed that he was heartbroken over the attack and did not know what drove his son to kill. Family deeply sad after seeing the attackThe family was questioned by Queensland Police after the attack. After seeing news reports of the murders, Cauchis family recognized him and contacted the police. Queensland Police Assistant Commissioner Roger Lowe said that when the family saw footage of the incident on TV, they thought it could be their son and approached authorities. The family said they were deeply hurt by his actions.Why he killed women The family said Joels actions were truly horrific and we are still trying to understand what happened. He had been struggling with mental health issues since his teenage years. His father revealed that he wanted a girlfriend, he has got no social skills and he was frustrated. Who were the six victims of Sydney attackThe attack happened at Westfield Bondi Junction, a popular shopping center about a mile away from the famous Bondi Beach in Sydneys affluent eastern suburbs. The victims of the Sydney attacks were identified as Faraz Tahir, Ashlee Good, Dawn Singleton, Jade Young, Pikria Darachia, Yixuan Cheng.