The international string of cyber attacks registered in the last few months has reached Brazil, hitting three government websites on Wednesday, international press reported.
Hackers disabled the websites of Brazil's federal government, presidency and tax collection agency for about 2.5 hours, making the sites inaccessible to the public. Their operation has since been restablished.
The Lulz Security (LulzSec) group of hackers has reportedly taken credit for the denial-of-service (DoS) attacks.
The group was reported to have said on Monday in a Twitter message that it was seeking to hack government websites to leak "classified government information."
However, the hackers did not access sensitive information from the sites this time, government officials were quoted as saying by Reuters.
In the past month, LulzSec has reportedly attacked high profile entities such as the US senate, the CIA website, and Sony.