India, Feb. 10 -- A day after three people were found dead inside a parked car on the Peeragarhi flyover in northwest Delhi, investigators said several aspects of the case have come to light, even as major questions remain unanswered. Based on police statements and preliminary findings, here are five things known so far about the mysterious deaths.

Police said the bodies of two men, aged 76 and 47, and a 40-year-old woman were discovered inside a white Tata Tigor parked on the service lane of the Peeragarhi flyover at around 3:50 pm on Sunday, after passers-by alerted authorities. The car was locked from the inside and had to be forced open by police, HT earlier reported.

Investigators found no external injuries, ligature marks or signs...