"It's just a creepy thing that people do every once in a while, is put police officer's names, their family members' names, their addresses on web sites," Los Angeles police Cmdr. Andrew Smith said.
Smith told The Associated Press confidential information on top police officials has been posted online at least twice before. Smith said the LAPD was investigating any posting of information on any celebrities who live in the city and request an inquiry.
"Some hackers sort of get into brinksmanship. And they want to try to see, 'Well, this is a well-known person, probably has a lot of security. Let's see if I can hack through their system,'" Garrett said.
Several of the pages featured unflattering pictures of the celebrities or government officials whose information was posted.
The site's homepage, which features an image of a girl with her eyes covered in black makeup, had more than 111,000 hits as of 7:15 a.m. ET.
ABC News' George Stephanopoulos, Pierre Thomas, Jack Date and Mary Bruce contributed to this report.