A person has been arrested for allegedly blackmailing a woman into having physical relations repeatedly by threatening to expose her nude pictures taken stealthily.

The Central Investigation Bureau arrested Niraj Kumar Chaudhary, 29, of Hetauda, Makwanpur district, for circulating the nude pictures of a woman whom he had known through a Facebook, a popular social media.

According to CIB, Chaudhary and the woman became friends in the social networking site and had regular conversations while the former was working in Saudi Arabia. The duo met one day after Chaudhary came back to Nepal.

Chaudhary took the girl to a hotel room and served her foods laced with drugs that made her unconscious. He then took nude pictures of her and circulated it through his Facebook and also distributed the lewd pictures to many friends of the victim.

"He used to blackmail her into having sex threatening to further circulate the pictures," said Superintendent of Police Tarini Prasad Lamsal, spokesperson of CIB. "He also used to threaten her over phone to manhandle her if she lodged complaint anywhere regarding the issue."

According to SP Lamsal, Chaudhary has been charged with Electronic Transactions Act, 2008. The Act states that anyone publishing such illegal materials shall be charged with a fine of Rs100,000 or, a jail term of five years, or both.

The CIB has also called on the general public to not accept friend requests from unknown persons and file an immediate complaint if anyone tries to harass or blackmail them over social networking sites.