In this frame grab provided from a video by Ariana Television News, four attackers are seen entering the second security check at the Serena hotel in Kabul, Afghanistan, on Thursday, March 20, 2014. (AP Photo/Arian Television News )
A closed-circuit security video shows security guards searching four attackers twice before allowing them to enter an Afghan hotel where the young men proceeded to the restaurant and killed nine diners, including four foreigners and two children.
The footage was broadcast on Saturday by a local Afghan TV station and shared with The Associated Press.
The question of how the gunmen penetrated the Serena hotel's tight security is one of the biggest mysteries surrounding Thursday's attack. Authorities say the weaponry was hidden in their shoes.
The video, obtained by Ariana Television News, starts with four men clad in traditional tunics walking through the perimeter gate, then being called back to be searched. The cameras then show them patted down again at the main security checkpoint after passing through a metal detector.