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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 shooters may have planned multiple attacks

US investigators are becoming increasingly convinced the California suspected shooters may have been planning multiple attacks, according to a US government source.

The investigators believe the shooters' weapon cache indicates that there may have been other planned attacks, but they are not sure about the targets, the source told Reuters.

They added that investigators believe the man of providing guns to the shooters has no apparent link to terrorism.

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