San Bernardino shooting: FBI says California shooting an act of terrorism

A mass shooting in California is being treated as an act of terrorism, the FBI has confirmed.

The Los Angeles Assistant Director of the FBI Dave Bowdich told reporters that the organisation had uncovered evidence of "extensive planning" and that the suspects had "attempted to destroy their digital fingerprints".

Tashfeen Malik and her husband Syed Rizwan Farook were killed in a shootout with police following Wednesday's attack, in which 14 people died.