The homemade explosives used by San Bernardino killers Syed Rizwan Farook and Tashfeen Malik came from an Al Qaeda-style design, according to NBC News.
According to NBC’s regional, law enforcement source, Farook’s detonator shared similarities with the toy car-based controller used in 2013’s Boston Marathon bombings. Though no link has been found between the two attacks, both Farook’s and the Tsarnaevs’ explosives utilized designs found in “Inspire” magazine, an al Qaeda publication circulated throughout the Arabian Peninsula.
Explosives left at Inland Regional Center failed to detonate upon Farook’s escape, and investigators believe his controller may have been too far out-of-range to trigger the explosions.
Additionally, San Bernardino police chief Jarrod Burguan said at a Thursday press conference that officials discovered 12 more pipe bombs and materials to construct more bombs at Farook’s mother’s house in Redland, CA.
BURGUAN: I will confirm that the search that took place revealed that there were 12 pipe bomb type devices found in that house or in the garage to that house. There were also hundreds of tools, many of which could be used to construct IEDs or pipe bombs, and in addition to that, they had other material to have produced some additional bombs as well.