Investigators consider terror ties in motives for California massacre

The shooters in the massacre in San Bernardino may have been radicalized. An American-born Muslim and his wife had allegedly been in touch with known terrorism suspects.

US intelligence officials reported that the San Bernardino gunman had been in contact with known Islamic extremists on social media. Details of the attack emerged as investigators tried to establish whether the rampage had been an act of terrorism.

Police said Farook and his wife had amassed enough bullets and bombs to slaughter hundreds when they launched their deadly attack on a holiday party at a social service center for the disabled, located in San Bernardino.