She was 87.
She had actively participated in the freedom struggle, after she was drawn to politics at the age of 16, they said, adding Ambal became the undivided Communist Party's first librarian in Mumbai (then Bombay) in the 1940s.
Disguised as flower sellers and vegetable vendors, Ambal and her sisters distributed hand written revolutionary pamphlets, when the Communist Party was banned by the British.
She worked in the state Electricity Department and was closely associated with the leaders like late ASR Chari in the Harbour Workers Union and late Anandan Nambiar and M Kalyanasundaram of the Dakshin Railways Employees Union in the 1940s and 50s.