A 25-year-old man residing in Mumbai was arrested today for allegedly killing his 20-year-old fiancee here on suspicion that she was in relationship with another man, the police said.

The incident occurred at Oval Maidan in south Mumbai, when the accused Salman Shekh allegedly stabbed Nasrin Shekh, following an argument, a police official said. The deceased was working at a food joint in south Mumbai while the accused is a resident of Mumbra in neighbouring Thane district, he said.