Police said that while searching the apartment of the couple, Syed Rizwan Farook, 28, and his wife Tashfeen Malik, 27, they found an armory of weapons and explosives including a dozen pipe bombs and thousands of rounds of ammunition.

FBI has taken charge of the probe into Wednesday's mass shooting in San Bernardino, California, and were combing through evidence, including cell phones and a computer hard drive to determine what prompted Farook and Malik to carry out the attack that claimed 14 lives and left 21 people wounded.

The FBI is treating the shooting as a potential terrorist act, though the agency is far from concluding that it was, two law enforcement officials said.

Farook, who is Pakistani-origin, and Malik, who is a Pakistani national, fired as many as 150 bullets inside the Inland Regional Center and then in the shootout with the police that left the couple dead, officials said.

The authorities have also released the names of the 14 victims, ranging in age from 26 to 60. Farook was in contact with a small number of suspected extremists, officials were quoted as saying.

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