Detective Inspector Scott Beard said police were called to the house in the suburb of Epsom at about 11:30 am and found three people in critical condition.
The man Sunil, who worked as a computer operator, was going on a motorcycle when he lost control of the bike and crashed into a road divider near Gandipet.
The deceased were identified as Renuka, a government teacher working at Gunturpally village of Parthagiri village, Sridhar, a businessman, and an employee of his company.
The victim Vikas and Mahesh got themselves drunk at the liquor shop and ended up arguing with each other, following which the liquor shop staff intervened and tried to pacify them.
Police sources said the couple had actually planned to kill themselves as well to prove that they would come back alive but the timely entry of police personnel averted the possible suicide.