A group that monitors extremist Web sites says Al Qaeda branch in Yemen has claimed responsibility for a deadly suicide bombing outside the U.S. Embassy there in September.

Thirteen people died in the attack, including an 18-year-old American woman of Yemeni origin.

The SITE Intelligence Group says the statement in an Al Qaeda electronic magazine includes an account of how the car bomb attack was carried out.

It also gives the names of the seven men involved, including a spiritual leader and six of his students who carried out the attack.

The statement warns further strikes will deliver a "taste of horrors."

Yemeni security officials had said this month that the men who assaulted the embassy had links to Al Qaeda.

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