A pilgrim from Madhya Pradesh on Saturday succumbed to her brain injuries suffered in Tuesday's Varanasi blast, taking the death toll to two.
The doctors at the BHU Hospital said Phool Rani (60) had a severe cerebral haemorrhage. Soon after she was brought to the hospital at 10.30 pm on Tuesday night, she underwent a brain surgery. Thereafter, she was shifted to the ICU and was put on the life support system.
Phool Rani was from Jerath village of Madhya Pradesh's Damoh district, 273 km east of Bhopal. She is survived by three sons.
On Tuesday, one-year-old girl Swastika Sharma was killed in the blast on the spot.
Four days after the tragedy, investigators are now looking at the possibility of local gangs/operatives being hired by terror masterminds to plant the bomb.
Investigators told HT efforts were being made to penetrate the terror modules and track down local hirelings who could have been roped in to plant the explosive.
The records of phone calls made over 14 days before the blast from Varanasi to Bangladesh, Nepal and Pakistan are being scanned.
Investigators, however, have not succeeded in ascertaining whether it was an improvised explosive device (IED) or a superior one.
Sources said there were no remnants of any IED or a device at the spot, indicating some new kind of explosive material was used.