PORTLAND (AP) — Oregon State Police say two female college students reported being locked out of their social networking sites by a hacker who demanded nude photographs.

A 16-year-old Clackamas youth is accused in the case. The Oregonian says the high school student is expected to face computer crime and theft by extortion charges in Clackamas County Juvenile Court.

One of the 18-year-old women attends Oregon State University, the other Washington State University. State police say the boy grew up within blocks of the two women.

Senior Trooper Randy Westbrook says the boy admitted hacking into the MySpace and Facebook pages when he was confronted by police, saying it was a prank.

“I explained to him, hacking into someone’s computer and trying to extort anything from someone is pretty serious,” Westbrook said.

The trooper sent subpoenas to the social networking sites, tracing e-mails sent by the hacker and eventually obtaining the address of the 16-year-old.

The Clackamas teen said he had guessed the victims’ passwords, Westbrook said.

The OSU student called police May 6 to report receiving five e-mails that said the only way she could regain control of her social-networking pages would be to send nude photographs of herself, Westbrook said. When she didn’t respond, another e-mail arrived requesting photos of her bare feet.

Westbrook then learned that a friend of the OSU victim, the young woman at WSU, had received similar e-mails and couldn’t connect to her MySpace and Facebook pages either.

The women were relieved to find out who was responsible, police said.