Blasts tear through Moscow subway

(CNN) – Two deadly explosions tore through subway stations in Moscow during Monday's morning rush when the trains were jam-packed. Investigators say female suicide bombers blew themselves up around 8 a.m. local time, when it would have been standing room only on the rails.

The first bomb ripped through a train killing dozens of people inside and on the platform. The stop is right underneath what used to be KGB headquarters. Our Matthew Chance reports from Moscow.

Read more: Women suicide bombers suspected in Moscow blasts