San Francisco - A widely distributed email claiming to contain a sex tape of Democratic presidential nominee Barack Obama conceals a cache of computer viruses from Eastern Europe, internet security company Websense said Thursday.

The e-mail, titled "Barack Obama sex story with girls," purports to come from the address "obamasex@obama.com" and reads in part "Sensation!!! United States Senator for Illinois Barack Obama in 2007 was travel to Ukraine and have sex action with many Ukrainian girls! You may view this private porno in a flash video. Download and view now."

The attachment opens several pornographic video clips, none of which feature Obama, while also installing software that steals personal data and sends it to a website in Finland. (dpa)