CNN is reporting that Syed Farook was in contact with what they are calling international terrorists via both phone and social media:
— CNN Breaking News (@cnnbrk) December 3, 2015
San Bernardino shooter Syed Rizwan Farook was in touch over the phone and via social media with more than one international terrorism subject who the FBI were already investigating, law enforcement officials said.
It appears that Farook was radicalized, which contributed to his motive, though other things — like workplace grievances — may have also played a role, other law enforcement sources said.
International terrorists is more likely members of Al Qaeda or ISIS. Probably the latter but we’ll know more when they reveal it.