MANILA - The National Bureau of Investigation is keeping tabs on a Facebook private group whose members allegedly post sensitive photos of women without their permission.

Members of the "Hokage Bible Study" group are encouraged to share photos or videos of women, sometimes accompanied by libelous captions, said NBI Cybercrime Division chief Martini Cruz.

"Iyung isang gustong maging member, ini-encourage nila to share some photos or videos ng mga babae na parang pinagkakatuwaan nila. Minsan naman photos ng mga magagandang babae," Cruz told radio DZMM.

"Although wala namang nudity, sinisiraan nila. Sinasabi nila na, 'Eto kailangan ng P2,000, bagong graduate ito, walang trabaho pa. Pwede niyo siyang contact-in.'"

Hokage refers to ninja leaders in anime Naruto. The term has been used to describe a perverted man who tries everything to get a woman.

The Hokage Bible Study describes itself as a "group for making fame not for making malicious scandal, pornography, sending nudes."

The page has close to 112,000 members, as of this posting.

Cruz however said some women in the Facebook group have complained that their photos and contact details were shared without permission.

Several posts in the page also contained compromising shots of women, some of whom were photographed sleeping while riding public vehicles.

Cruz added that in some instances, the women's photos were used for the fake accounts of some Hokage Bible Study members.

Investigators however have yet to receive a formal complaint against the group, Cruz said.

"Hinahanapan pa natin ito ng mga violations. Pero at the same time, wala pa kasing pumupunta sa office to file a complaint against this group," he said.

For now, Cruz advised the public to refrain from sharing their contact details and provocative photos online.

"Ang ipinapayo po natin sa citizens natin, huwag naman silang post nang post ng information about themselves, contact number, address. Saka iwasan nilang magseselfie nang kung minsan naliligo naka-one piece, two piece," he said.