Hacking outfit LulzSec said it penetrated servers belonging to the Arizona Department of Public Safety (DPS) and has posted data including, email correspondence and staff data on file-sharing sites.
The DPS confirmed its systems had been hacked yesterday. Steve Harrison said at least eight officers' personal information was stolen and leaked, including addresses and mobile phone numbers.
"When you put out personal information, you don't know what kind of people will respond," he said. E-mail accounts passwords were also posted online he said.
LulzSec said it targeted Arizona because of its tough immigration law "and the racial profiling anti-immigrant police state that is Arizona".
It said its haul includes: "hundreds of private intelligence bulletins, training manuals, personal email correspondence, names, phone numbers, addresses and passwords belonging to Arizona law enforcement."
The outfit said it will release "more classified documents and embarrassing personal details of military and law enforcement" over the coming weeks.
Meanwhile, LulzSec web site itself appears to have been briefly taken offline in an operation claimed by ex-US military man turned pro-establishment hacker The Jester. He said the Lulz Security site is hosted on servers in Malaysia.
"www.lulzsecurity.com - TANGO DOWN - 'this is General Hummel, from Alcatraz, Out' - http://t.co/oNm29Pv for the lulz," he wrote. The link is to a Pastebin posting that appears to contain details of LulzSec IRC chat logs