New Delhi, Sept. 2 -- A 60-year-old man was allegedly robbed and killed by his niece and three others inside his house in Delhi's Rohini area, while one of them kept watch outside on Tuesday evening, police said. Three of them, including the niece, were arrested, police said.

According to police, the deceased, Rakesh Khanna, a cardiac patient who lived with his wife in Rohini sector 3, was alone at his house when his niece and others attacked him and robbed Rs.1.5 lakhs cash and gold jewellery from his house.

At the time of the incident, his wife was at a local market, police said. Senior police officers said his wife reached home at 8.15pm and found the house ransacked. When she entered her room, she found Khanna lying unconscious on t...