Ritu (30) was poisoned by her in-laws over a dowry demand in the Police Line area yesterday.
A case has been registered against her husband Ankit (26) and father-in-law, who are both absconding, the police said.
The body of the victim has been sent for a post-mortem and a probe is on.
According to a complaint lodged by Ritu's father, Sukhpal, her in-laws were demanding more dowry from the family.
When the demand was not met, Ritu was killed. She married Ankit in November 2013.
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The police has arrested Parveen and a case has been registered against him.
Her family has alleged in the complaint that she was harassed for dowry by her in-laws, and later murdered by her husband.
The husband, whom she married a year ago, has denied the allegation against him. The body has been sent for a post- mortem.