Kolkata, July 6 -- West Bengal Police on Monday arrested the prime accused in the rape and murder of a 12-year-old girl in Baruipur, taking the total number of arrests in the case to three, even as a preliminary post-mortem report revealed the horrifying brutality of the crime that has set South 24 Parganas district on edge.

The prime accused, identified as Anand Sardar, was picked up from Baruipur's market area on Monday afternoon after police traced him through his mobile phone tower location. He will be produced before a local court and taken into police custody for further interrogation, a senior officer told PTI.

Two other accused, Prabhas Mondal and Dibakar Sardar, were arrested earlier, one on Sunday night and the other on Monday...