India, Aug. 2 -- A 28-year-old man and his 25-year-old sister on Thursday allegedly died by suicide after consuming a poisonous substance in their house in a locality under the jurisdiction of the Kavi Nagar police station area, said police officials on Friday.

The police said that they came to know about the incident when their stepmother reached the house around 4pm on Thursday and found both of them unconscious. They were taken to a hospital with the help of neighbours but declared dead by doctors.

"We received information from the hospital. During the investigation, it came to light that they possibly consumed some poisonous substance. The woman was working at a private company while her brother was an officer with a central governm...