Kalka Mandir, also known as Kalkaji Temple, is a famous Hindu mandir or temple, dedicated to Hindu Goddess Kali. This temple is situated in the southern part of Delhi, India, in Kalkaji, a locality that has derived its name from this famous temple and is located opposite Nehru Place business centre. The temple is easily accessible by all forms of public transport and is near Nehru Place and Okhla. The general belief is that the image of the Goddess Kalka here a self-manifested one, and that the shrine dates back to Satya Yuga when the Goddess Kalika had incarnated and killed the demon Raktabija along with other giant demons.

Kalka or Kalkaji Mandir is amongst the oldest and the most reverend ancient temples of India. The temple is dedicated to goddess Kalka or Kali, an incarnation of Durga. It is also called 'Jayanti Peetha' or 'Manokamna Siddha Peetha'. 'Manokamna' literally means desire, 'Siddha' means fulfillment, and 'Peetha' means shrine. So, it is believed to be the holy shrine where one gets the blessings of Maa Kalika Devi (Goddess or Mother Kalika) for the fulfillment of one's desires.

Harjinder Singh Jinda was a member of a Sikh organization Khalistan Commando Force and one of the two assassins of Arun Vaidya (the Chief of Indian army at the time of Operation Bluestar and architect of Operation Bluestar). He was responsible for three high-profile killings; Arjan Dass, Lalit Maken and Gen. Vaidya. He along with other members of Khalistan Commando Force participated in Indian history's biggest bank robbery of Rs. 5.70 crore ($4.5 million) from Punjab National Bank, Miller Gunj branch, Ludhiana to finance the campaign for a separate Sikh state of Khalistan.

Harjinder Singh's mother's and father's names are Gurnam Kaur and Gulzar Singh. Jinda had two older brothers, Nirbhail Singh and Bhupinder Singh and one sister, Balvinder Kaur. Harinder Singh alias Mathra Singh and Jagjit Singh were nephews of Harjinder Singh Jinda. Sikh militant Surjit Singh Penta (who committed suicide by consuming cyanide during Operation Black Thunder in the year of 1998) was a cousin of Harjinder Singh Jinda. He belonged to a farmer family.