Police arrested the doctor from a hotel where he has been staying since October 31 and meeting Chainika Kumari, the victim and a para-medic by profession.
Senior Superintendent of Police Anoop Mathew said the accused, who works in a reputed hospital in Kolkata, strangulated the 30-year-old woman on suspicion that she was having another affair.
He then stuffed the body in a suitcase purchased locally and dumped it near the parking lot of Tatanagar railway station last night, Mathew told a press conference.
When Kumar's body was discovered, the police found her purse, shoes, comb, mobile phone and office ID card in the suitcase, Mathew said.
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Though the victim was on leave for the past couple of days, she used to leave home at her usual time on the pretext of going to hospital to meet the doctor in the hotel and return home at her usual time.
A senior official of the hospital where Kumari worked said her parents called up the hospital when she did not return home.
"When we called up that number and enquired about her, he initially said he did not know about her whereabouts. But during another call later, he started crying and said he had killed her," the official said adding that the doctor did not leave the hotel even after that confession.
Police arrested him from there subsequently.
The SSP said the relation between the two had strained for sometime over the doctor's suspicion that she was having another affair with someone.
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