M. Muthulakshmi (50), a resident of Chettikupam near Marakkanam, was found dead near a coconut farm at Koonimedu on Sunday.
Police said that her face and head bore bleeding injuries as if smashed with a hard object.
While the jewels on her person were intact, the Rs. 6,000 she was said to be carrying was missing.
She should have been waylaid and attacked while walking from Koonimedu to the East Coast Road to catch a bus to Puducherry, police said.
She was staying with her daughter who is running a provision store at Koonimedu.
The police have traced a blood stained granite stone and two wooden logs in the vicinity.
Hunt is on to trace the murderers. — Special Correspondent