Kenya Mall Massacre Enters Day Four

Kenyan authorities vow the end is near as the nation enters the fourth day of a terror attack that shook it to the core, CNN's Arwa Damon reports.

The Kenyan government now says it has regained control of the Westgate Mall, but it's still unclear if all of the hostages have been freed after a three-day standoff with Islamist militants.

This morning, we're learning more about the attackers who launched the deadly siege.  Three have been killed but the exact number of gunmen that remain inside is still unknown.

Kenya's foreign minister told "PBS' Newshour" that two or three of the militants are young Americans who appeared to be of Somali or Arab origin.  The state department is looking into these reports.

For more on this developing story, visit CNN.com