The woman's body was found hanging from a fan in a mill quarters yesterday, with her dupatta around her neck.
Police suspected her partner, Abdul Jabbar alias Nazar, behind the act, police said.
A special police team managed to arrest Abdul, while he was trying to flee to his native place by train late last night, police said.
Preliminary inquiry revealed that both, claiming to be married, joined the spinning mill and were staying in the employees' quarters on its premises.
Investigation revealed that the woman was already married with two children and had developed illicit relationship with Abdul.
As the woman continued the relationship, her husband left her.