The commissionerate police have received a vital clue in the case pertaining to the attack on two women in the form of close-circuit television (CCTV) footage of the spot wherein a man on bicycle is seen roaming outside the victims' house at Shakti Nagar here.
Sources said the police had been locating the cyclist who was seen in the CCTV footage.
Raj Rani (80) had succumbed to her injuries a day after the attack on Monday while her daughter-in-law is still undergoing treatment at a local hospital here.
A CCTV camera was placed outside a house in the same street where the cyclist was spotted with a bag kept in the dickey for 14 minutes.
Sources further said the police are treating the man as a prime suspect in the incident and efforts are being made to trace him. The CCTV footage is being seen as a crucial evidence since the police have not made any headway in the case so far.
The police had earlier questioned the family members and tenants of the victims and detained some persons but could not get any concrete lead.
Investigation officers also scanned the mobile calls made or received in the street at the time of the attack, sources said.
Deputy commissioner of police (DCP) Naveen Singla said CCTV footages had been scanned as part of the investigation but refused to divulge further details.
There has been little improvement in the condition of Madhu, one of the victims. She was shifted from the ICU to a general ward at the Rattan Hospital.
On Monday evening, house owner, Rakesh Seth (59), a retired bank manager, went to his friend at 5 pm after which his wife Madhu and mother Raj Rani were at home. Soon after Rakesh had left, two men entered their house and attacked the two women with sharp-edged weapons.
After injuring them, the accused snatched their gold earrings and fled. On the first day of attack, the police had registered a case under sections of 174 of the CrPC.
However, doctors stated that Raj Rani and daughter in-law Madhu had sustained multiple injuries, including fractures on face, skull and ears.
Following this, the police changed sections in the case.