A 28-year-old man killed his parents-in-laws and injured his wife, minor daughter and brother-in-law in Malviya Nagar area of south Delhi on Friday evening in a fit of rage.
Chintu himself also sustained severe injuries as he was held and thrashed by neighbours who managed to catch hold of him, said a senior police officer.
The accused had strained relations with his wife Renu who had left him and was staying at her parents' home and had even filed for divorce from him.
Chintu attacked Renu with a large tent nail at her parents' house in Jatav Basti around 7.45 pm. When his mother-in-law Roshan intervened, he hit her on the head. His father-in-law Trilok Chand, who was also attacked by Chintu, died later in hospital.
Chintu's daughter Neha, Renu and brother-in-law are currently undergoing treatment at AIIMS where their condition is stated to be critical.
While Chintu was attacking his wife Renu, his children Neha (7) and Laddoo (5) started crying for help and in a fit of rage, he pushed Neha off the terrace.
When neighbours heard cries for help from the house, they came and managed to catch Chintu who was trying to flee, and beat him up. He is currently admitted in AIIMS and is in a critical condition, the police said.
Renu's family members claimed she was being harassed by Chintu and his family for dowry and upset by their constant demands, she had left him and was staying at her parents' home.
Families of Renu and Chintu families had arrived at an arrangement that she would stay at her parents' house but Chintu didn't accept this arrangement. In a fit of rage, he attacked Renu and his family.