This from CNN...
Three of the attackers at the Westgate Mall in Nairobi, Kenya, are from the United States, according to sources within the terror group Al-Shabaab.
The Americans are among nine people listed on a since-shuttered Twitter account, the sources said. Other names include two individuals from Somalia and one each from Canada, Finland, Kenya and the United Kingdom, according to the list. They range in age from 20 to 27 years old.
Two of the Americans are from Minneapolis-St. Paul, Minnesota, and the other is from Kansas City, Missouri, according to the list.