Authorities and celebrities were grappling with how to respond to a website that posted what appears to be private financial information about top government officials and stars such as Jay-Z and Mel Gibson.

Other targeted stars included Beyoncé, Ashton Kutcher, Kim Kardashian and Paris Hilton. Info posted about Vice President Joe Biden and former Secretary of State Hillary Clinton did not include credit reports, but included addresses and other sensitive information.

Social Security numbers posted on Jay-Z, Gibson and others matched records in public databases.

The site, which bears an Internet suffix originally assigned to the Soviet Union, expanded throughout the day Monday to add entries on Britney Spears, former VP candidate Sarah Palin and others.

The site did not state how the information was obtained or why the people targeted on the site were selected. A Twitter profile linked to the site and created after its existence was first reported by celebrity website TMZ included an anti-police message in Russian.

Los Angeles police Cmdr. Andrew Smith said the LAPD was investigating the posting of L.A. Police Chief Charlie Beck’s information and would also investigate the posting of info on any celebrities who live in the city and request an inquiry. He said confidential information on top police officials has been posted online at least twice before.

Information was likely taken from what is supposed to be a secure database of city employees.

Several of the pages featured unflattering pictures of the celebrities or government officials whose information was posted.

The site’s page on Beck includes a taunting reference to former officer Christopher Dorner, who apparently committed suicide after he killed four people during a multi-day rampage. Beck’s page included the message “#YouCantCornerTheDorner” and an image of a woman protesting police corruption.