New Delhi: The mother of a lawyer who appears for Rajesh Talwar and his wife Nupur, accused in Aarushi murder case, was on Tuesday found strangled in her East Delhi residence and the police suspected robbery could be the motive behind the crime.

Anna Mammen (85), the mother of lawyer Rebbeca Mammen John who is appearing for the Talwar family in the case, was found strangulated in her residence in Vivek Vihar at around
4:30 pm, a senior Delhi Police official said.

She was alone at home when the assailants entered the house and attacked her, the official said. She was a retired teacher and was giving tuitions at her home.

Mammen was taken to a nearby hospital where she was declared brought dead, he said.

The incident came to light when a security guard noticed that the back door of Mammen's house was open. He alerted her tenants who were staying on the first floor.

"They entered the house and found that she was strangulated," the official said.

Investigators suspect it to be a case of robbery-cum- murder citing that some articles were found missing from the house.

"She might have resisted the robbery attempt, which led to the murder. However, we are not sure about this. We are investigating all angles," the official said.

Her two sons had left for Australia and the United States on Monday.

Neighbours recalled the woman as a "friendly and nice" person.