Akula Archana, allegedly poisoned her two daughters and then committed suicide, in what appears to be a case of dowry harassment, the police said.
Fourth Town police station house officer P V V Narasimha Rao said Archana was married to one Satish Kalyan Chakravarthi in 2011, who works in a private construction company and lives with his mother and brother's family in a three-bedroom apartment.
Allegedly harassment for more dowry began after a few months of marriage and it increased after the second daughter was born three months ago, the police official said.
Satish Kalyan, his brother and his mother have been arrested for alleged abetment of suicide under Section 306 of the Indian Penal Code.