The mother-son duo have been identified as Anju Devi (37) and Prashant (16). Anju's husband, Raman Chaudhary, who has a computer repair shop, was not at home when the incident took place, a senior police official said.
The assailant, whose condition is reported to be critical, has been identified as one Shyam Singh, a native of Madhubani in Bihar, who lives with his wife in west Delhi's Uttam Nagar area.
Locals told police they saw Anju come to the balcony of her first floor house, screaming that somebody was attacking her son. By the time they could rush to her house, Anju went to her son's rescue and Singh allegedly attacked her too.
Locals then surrounded the house and called up the police around 4.30 PM. Failing to find any way to escape, Singh locked himself inside a room and allegedly cut his throat, suspectedly trying to end his own life.
While Anju was declared dead at the hospital, Prashant is believed to have died on the spot. The accused too is currently admitted in hospital, where his condition is said to be critical, police said, adding a case of murder has been registered in connection with the incident.
The police are questioning Anju's husband Raman Chaudhary and Shyam Singh's wife in connection with the matter, the official said, adding that the case is being probed from all possible angles.
