Ludhiana, April 13 -- Two cold-blooded murders in as many days shook the city and have kept the police, who are yet to yield strong evidence hinting at a breakthrough, on their toes.

A day after the murder of 90-year-old Jamaldin, the grandfather of a jail employee Abdul Gaffar, police questioned people at the staff's residential colony, suspecting the handiwork of an insider.

The postmortem report of the victim suggested that he died of suffocation and burn injuries. The team of doctors who conducted the autopsy found smoke particles in the deceased's lungs and revealed that he had suffered 80% burn injuries.

The doctors also preserved his clothes to ascertain if the robbers used an inflammable substance to set him on fire.

Sub-inspe...