49 US Web sites of both the Democrat and Republican parties have been hacked to criticise President Obama just hours after his State of the Union address.

The hacker accessed the Web sites, belonging to members of the House of Representatives and posted a vulgar message about President Obama: "F--- OBAMA!! Red Eye CREW !!!!! O RESTO E HACKER!!! by HADES; m4V3RiCk; T4ph0d4 -- FROM BRASIL,"

In August last year dozens of House of Representative Web sites were similarly hacked and defaced by an Indonesian hacker.

Congressional investigators are conducting an investigation, while the sites are currently “undergoing maintenance”.

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