Authorities searched Friday for two men described as persons of interest in the disappearance of a female college student who met one of them on an Internet site.

San Diego State University student Donna Jou, 19, vanished two weeks ago, said Orange County sheriff's spokesman Jim Amormino.

She was last seen by her brother on June 23 getting on the back of a motorcycle driven by a man only identified as "Skinny Puppy," or by the name Kyle, Amormino said.

Jou met the man on the Web site Craigslist.com, Amormino said.

Investigators were also looking for registered sex offender John Steven Burgess, who rents the house Jou apparently went to that night for a party.

"We're not calling them suspects at this stage, but we want to question them," Amormino said.

The day after Jou left for the party, her mother received a text message from Jou's cell phone saying she was coming home, Amormino said.

Jou, however, never arrived.

"It was suspicious that she didn't call, and that the message was in all caps. Her family says she doesn't text like that," Amormino said. "It's also of great concern that Burgess is a sex offender. We want to see if he can shed any light on what happened."

Jou had also not accessed her credit cards or cell phone since she was reported missing, Amormino said.