A 28-year-old man was arrested on Thursday for allegedly stabbing a man to death with his kirpan, a ceremonial dagger worn by baptised Sikhs, at Tilak Nagar.
According to police, Jatinder Pal Singh of Chanderlok Colony, attacked Kulwinder Singh, 48, after the latter deterred him from meeting his tenant's wife, Manpreet Kaur.
Besides killing Kulwinder, the accused also allegedly injured three others, including a pregnant Manpreet, who suffered a miscarriage in the attack.
The Basti Jodhewal police recovered the kirpan from Jatinder's possession, and registered a case of murder against him.
The deceased was a labourer at a tyre factory in Meharban.
In his complaint to police, Karnail Singh, father of deceased, said a baptised Sikh, Jatinder used to visit their house in Tilak Nagar to meet their tenant Manpreet, in absence of her husband, who was a photographer.
On Wednesday, when he came to meet Manpreet, suspecting them of having illicit relations, Kulwinder and his family members tried to deter him.
In a fit of rage, Jatinder flashed his kirpan and opened attack on Kulwinder, his brother Nirmaljit Singh and his daughter. A grievously injured Kulwinder fell on the spot, Karnail alleged.
When Manpreet intervened, Jatinder attacked her as well, following which she suffered a miscarriage. The accused then fled the spot.
Meanwhile, Kulwinder's kin rushed him to a hospital, where he succumbed to injuries during treatment.
Karnail told the police that Jatinder had helped Manpreet and her husband rent their house, adding that they had told the couple to vacate their premises after they came to know of Manpreet's illicit relations.
Inspector Gurpreet Singh, SHO, Basti Jodhewal police station, said the accused was unmarried, adding that he was planning to flee the city, but was arrested.