Dipika Sanghvi (29) and her daughter Hetal (8) were found murdered in their flat last week. According to police, the duo were murdered on January 25, but the matter came to light after neighbours complained of foul smell emanating from the flat.
The accused, identified as Vinayak Apur, was arrested from Dahisar in Thane district, said Superintendent of Police (Rural) Mahesh Patil.
He said Dipika, who was living separately from her husband, was in relationship with Apur, her colleague in the Dahisar-based call centre.
"Her husband Kartik used to give her Rs 7,000 towards monthly expenses. He was aware about the affair between Dipika and her boyfriend," the officer said.
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Narrating the sequence of event, Patil said Dipika and Apur had had a heated argument on January 25, following which he hit her with a heavy and blunt object on her head and strangulated her.
"Hetal who was sleeping in next room woke up after hearing the commotion and witnessed the incident. However, Apur also strangled her and wrapped her body in bed before covering it with a bed sheet," the SP said.
"However, he was caught on CCTV while exiting the building. In meantime, he went to Goa and from there to Shirdi before returning to Dahisar," he said.