The couple who opened fire in San Bernardino, killing 14, may have been in contact with terrorists overseas, according to new reports.
The killers were named as San Bernardino County employee Syed Farook, 28, and his 27-year-old wife Tashfeen Malik, a pharmacist and Pakistani national who had lived in Saudi Arabia.
The couple, who met online and had a six-month-old daughter, were apparently not on law enforcement's radar and colleagues said Farook, a Muslim, did not strike them as a fanatic.
But sources told CNN that he had been in touch with "overseas terror suspects."
Officials have not yet given a motive for the attack.
"It is possible that this is terrorist-related, but we don't know," President Obama said on Thursday. "It's also possible this was workplace-related. There may be mixed motives in all this, which makes the investigation more complicated. But rest assured, we will get to the bottom of this."