A woman was arrested on charges of possessing the banned narcotic substance ganja in the city on Wednesday.
Kumari (65) of Cuddalore was waiting for a bus at Mint Road bus stop when policemen on patrol interrogated her.
On checking her bag, police noticed the consignment, which she had reportedly got from Vijayawada.
She had boarded a train to Chennai and got down at Basin Bridge and was waiting to board a bus to Koyambedu, police said.
They added that the value of the seized cannabis was Rs. two lakh.