While 64-year-old Singh's throat had been slit, his mother Gurcharan Kaur was suspected to have been strangled at their Phase 3B2 home, said an official spokesman of the chief minister's office.
There were injury marks on their necks, said Mohali DSP Alam Vijay Singh. A case of murder has been registered, a police official said.
The Punjab Police has set up a Special Investigative Team (SIT) under Inspector General (Crime) to probe the suspected murder, the spokesman said.
The incident came to light when some relatives of the deceased went to the scribe's house between 12 to 1 pm today.
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He added that a car owned by the deceased was found to be missing while refusing to elaborate more on this aspect saying a probe was on.
There was no closed-circuit television (CCTV) in the house, Chahal said.
Singh a former news editor with The Indian Express had also worked for the The Tribune and The Times of India in Chandigarh.
Taking cognisance of the crime, chief minister Amarinder Singh called up DGP Suresh Arora directing that a SIT be set up for a thorough investigation.
The chief minister also directed the police to beef up security in the area and ensure the safety and security of the ordinary citizens, he added.
Meanwhile, media-persons in Punjab, Haryana and Chandigarh strongly condemned the double murder and sought immediate arrest of those behind the crime.
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