The two brothers-in-law of the victim were arrested on Friday night, while the husband, who is interning at a civic-run hospital, was apprehended on Saturday.
The body of a 24-year-old pregnant woman, with semen stains on her private parts, was recovered from a suitcase abandoned at Sandhurst Road railway station of Central Railway on Tuesday.
"The deceased was identified as Rehmat who hailed from Bihar and resided at Mumbra on the outskirts of Mumbai. An engineering student Tabrez Khan (21) and his cousin Abdul Hashib Khan (20) were arrested last night in connection with her murder. Both the accused are brothers-in-law of the deceased. The two were produced before a local court which remanded them in police custody till March 25," Government Railway Police (GRP) Commissioner Tukaram Chavan told PTI.
According to the police, Rehmat and Parvez Khan, who were neighbours from Bihar, had an affair before getting married in Delhi last year. After their marriage, the duo came to Mumbra where they were staying.
In the meantime, a surgeon from Madhya Pradesh offered Parvez a proposal to marry his daughter, to which the latter agreed. "The MP surgeon was not aware Parvez was already married," the police said. Parvez married the MP girl and started avoiding Rehmat, the police said.
"On learning about Pervez's marriage, Rehmat started arguing with him, after which he had left her. Hashib told Rehmat that Parvez was there in Delhi, following which the victim, along with Hashib, went to Delhi searching for her husband on February 6. Hashib, however, left Rehmat in the Capital. After a month, Rehmat returned to Mumbra in the first week of March," Chavan said.
Following her return, the trio planned her murder, the police said, adding that she was killed in an isolated location in Mumbra on Monday.
The accused then stuffed her body in a suitcase and abandoned it in a local train at Mumbra, after which "a passenger saw the abandoned bag in the train, slightly opened it after alighting the train at Sandhurst Road. When he discovered the body, he left the bag on the platform."