Two unidentified men robbed a 72-year-old woman at knifepoint in her house on 5{+t}{+h}Street, Abiramapuram, on Friday afternoon, according to police sources.

The victim, Chitra, was alone at home when the suspects came and told her that they are coming from her son's office and he had sent them to get Rs.1 lakh from the house for some urgent work. She did not believe them and refused to give the money. The men whipped out a knife and tied her up. They then took jewellery weighing 18 sovereigns from the house and fled, sources said.