There is a 'very strong' possibility that the Pakistani wife radicalised her Pakistani-American husband before the couple went on a shooting rampage and killed 14 people in California, a media report said today.

27-year-old Tashfeen Malik may have radicalised her husband Syed Farook, 28, Fox News quoted investigators as saying, a day after the heavily-armed couple opened indiscriminate fire during a party at a social service centre for people with disabilities in San Bernardino, California.

Law enforcement sources told the network that there was a 'very strong' possibility that Malik functioned as Farook's terror trainer and may have even put together pipe bombs found by authorities at the various crime scenes.

Investigators also believe that the parents of a 6-month-old daughter, had planned a second attack after the shooting at the social service centre that killed 14 people and injured 21 others