Kolkata: A Bangladeshi national, one of the prime accused in the rape of a septuagenarian nun inside a convent in West Bengal's Nadia district, was arrested and sent to police custody on Thursday, police said.

The accused — identified as Nazrul Islam — was nabbed by sleuths of the Criminal Investigation Department (CID) from Kolkata's Sealdah railway station on Wednesday night.

"Islam, a 28-year-old resident of Jessore district in Bangladesh, was arrested on Wednesday night. He is a prime accused in the Ranaghat rape case," CID Deputy Inspector General (Operations) Dilip Kumar Adak said.

During the day, he was presented before the court of additional chief judicial magistrate (Ranaghat) B.B. Mondal which sent him to 14 days police custody.

Police in May, had arrested two accused from the Sealdah station.

So far, six men have been arrested for the March 14 incident in which a gang stormed the Jesus and Mary Convent in Ranaghat in Nadia district and allegedly raped a 71-year-old nun.

The incident created a nationwide outrage with the Prime Minister's Office as well as the National Human Rights Commission taking cognizance of the matter.

The survivor subsequently left the state for an undisclosed location. (IANS)