SHO Indirapuram Gorakhnath Yadav said the woman Ranjana a resident of Govinpuram was staying in flat in sector-14 of Vasundhara with her live-in partner Aziz Khan a native of Masuri town.
Both of them were employed as teacher in a private school.
On February 3 she consumed poised after a scuffle with Aziz.
She was rushed to a nearby hospital where she died during treatment.
On receiving information police reached the hospital and detained Aziz for questioning.