Neighbourhood Chief Inspector Vicks Hayward-Melen said it was an incredibly tragic and heart-breaking incident in which three children have sadly died .
Prima facie investigation suggests that the 40-year-old man died by suicide while his 26-year-old live-in-partner and her 12-year-old son and six-year-old daughter died after consuming some poisonous substances, said Sachin Sharma, superintendent of police (SP)
The authorities discovered the three bodies Monday afternoon in a Fremont apartment after responding to a 911 call for help that came from inside the residence, the police said Tuesday.