San Bernardino Shooting Investigation Ongoing
(SAN BERNARDINO, Calif.) -- Authorities are continuing to investigate the suspected shooters in the San Bernardino massacre - which left 14 people dead and more than 21 injured after revealing in a press conference, they found an arsenal of weapons and ammunition at the suspects home.
The suspected shooters more than 1,600 rounds of ammunition with them and another 4,500 at their house in California and fired between 65 and 75 times in less than 4 minutes at an event for the county health department, authorities said.
The news came as the number of people injured in Wednesday's shooting increased to 21, including 18 county employees. Of the 14 killed, 12 were county employees.
Authorities confirmed the suspected shooters - Syed Rizwan Farook and Tashfeen Malik - had thousands of rounds as part of the massive arsenal they had on hand and at their home when they attacked. They were later killed in a police shootout.
Police said they found an eye-popping 2,500 rounds for assault rifles and 2,000 rounds for handguns inside the home in nearby Redlands.
Investigators also found a dozen pipe bomb-style devices and hundreds of tools that police said could be used to build improvised explosive devices (IEDs).
In addition to the two assault rifles and two semi-automatic handguns that were used in the shooting, investigators also found three pipe bomb-style devices attached together at the scene of the attack that investigators believed to be explosive devices. They were disposed of by the bomb squad.
Law enforcement sources tell ABC News the IEDs found in the building were remote detonated devices. The devices were described by one source as “rudimentary.” Sources believed the bombs used radio-controlled activation of the kind used on toy remote control cars.
The galvanized pipe used in the bomb construction was shaped like an elbow and had metal end caps. Sources say the explosive filler was likely black powder or smokeless powder, commonly known as gun powder.
"They sprayed the room with bullets," San Bernardino Police Chief Jarrod Burguan said at a news conference Thursday.
The motive of the shooting is still unknown, but Burguan said investigators do not believe there was an individual target in the shooting, which left 14 people dead. Terrorism has not been ruled out.
The shooting, the deadliest in the United States since the 2012 Newtown Elementary School massacre in Connecticut, took place at a conference and holiday luncheon for the San Bernardino County Health Department.
Farook worked for the county for five years and authorities said that he appeared to be angry when he left the event.
"He did leave the party early under some circumstances that was described as angry or something of that nature," Chief Burguan said.
The suspects had a 6-month-old daughter together and had dropped off the baby with one of their mothers, saying they had a doctor's appointment, Council on American-Islamic Relations-Los Angeles Executive Director Hussam Ayloush told ABC News.
Farook's brother-in-law said the pair got married two years ago, but police have not confirmed the nature of their relationship.
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