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California shooters had been radicalised 'for some time'

California shooters Syed Farook and Tashfeen Malik had been radicalised "for quite some time" before killing 14 people in San Bernadino last week, the FBI has revealed.

Both took part in target practice, on one occasion just days before the deadly attack on an office Christmas party.

Syed Rizwan Farook, 28, and Tashfeen Malik, 27, killed 14 people and injured 21 others in the attack on an office Christmas party in the city of San Bernadino. Many of the victims were food inspector Farook's colleagues.

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California shooting suspects wore 'assault-style' clothing

US Police Chief Jarrod Burguan said the two suspects in the California shooting were armed with assault rifles and handguns and dressed in "assault-style" clothing.

Police officers with soldiers. Credit: Reuters

The police chief said he knew of no possible motive for the attack.

David Bowdich, an assistant regional FBI director, said authorities had not yet ruled out whether the shooting was an act of terrorism.

He told reporters: "It is a possibility, but we don't know that".

"It's possible it goes down that road. It's possible it does not."

Burguan said earlier: "Obviously, at a minimum, we have a domestic-type, terrorist-type situation that occurred here."

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