“The FBI is hunting a 12-man terrorist ‘sleeper cell’ linked to the brothers suspected of carrying out the Boston bombings.
The Bureau believes that Tamerlan and Dzhokhar Tsarnaev received training in bomb-making before they carried out the attack, which killed three people.”
Source: Boston Marathon Bombings: FBI Hunts Terror ‘Sleeper Cell’ Linked to Tsarnaev Brothers – IBTimes UK
