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CBS News obtains photos of Calif. shooters' bombs

CBS News has obtained images of explosive devices found at a Southern California social services center and the home of Syed Rizwan Farook, 28, and his wife, Tashfeen Malik, 27.

Below is a photograph of the explosive device found at the facility where the holiday party was held. It is a cell phone photograph taken of the screen of the robot used by bomb squad to evaluate the explosive device. The photo shows a yellow toy car with a remote device intended to be the ignition source and three pipes connected to it and wires.

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Cell phone photograph taken of the screen of the robot used by bomb squad to evaluate the explosive device. The photo shows a yellow toy car with a remote device intended to be the ignition source and three pipes connected to it and wires. CBS News

A second photograph, below, shows pipe bombs in a duffel type bag found at suspects' residence.

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Pipe bombs in a duffel type bag found at suspects' residence. CBS News

The explosives are in addition to a large quantity of arms detailed by law enforcement sources Thursday. The husband-and-wife attackers who slaughtered 14 people at an employee banquet fired as many as 75 rifle rounds in the assault, left behind three rigged-together pipe bombs with a remote-control device that apparently malfunctioned, and had over 1,600 more bullets with them when they were gunned down in their SUV, authorities said Thursday.

At their home, they had 12 pipe bombs, tools for making more such explosives, and over 3,000 more rounds of ammunition, Police Chief Jarrod Burguan said.

Law enforcement sources tell CBS News senior investigative producer Pat Milton the suspects' explosive devices are nearly a carbon copy of bomb constructing instructions provided for in one of the very first issues of al Qaeda's online magazine, INSPIRE, entitled "How To Build A Bomb In the Kitchen of Your Mom."

According to the source in the suspects' residence, there were two to four fully-assembled devices and more than a dozen more devices in various stages of assembly.

The bombs in their various stages were made of the ingredients provided for in terrorists' groups INSPIRE magazine, including Christmas tree lights to serve as a fuse, radio controlled toys to be used as a triggering mechanism and smokeless gun powder, according to the source.

The source told Milton that there were three or more unopened packages of toy cars in the house and numerous strings of Christmas tree lights.

It is not known whether the suspects got the directions by reading INSPIRE online or whether they got the bomb instructions elsewhere.