Who Are The Active Shooters Behind The San Bernardino Shooting? What We Know So Far About Inland Regional Center Gunmen

Three suspects remained at large Wednesday after a shooting that killed at least 14 people and injured at least 14 others at the Inland Regional Center in San Bernardino, California, authorities said. Police launched a search for the suspects, who fled the scene in a dark-colored SUV following the shooting, Fox News reported.

The suspects were believed to be white males dressed in military gear and what could be body armor. It was not known how many suspects opened fire at the facility. At a news conference Wednesday afternoon local time, police confirmed the shooters were armed with "long guns."

A group unaffiliated with the Inland Regional Center reportedly rented a conference room Wednesday where the gunmen later opened fire, said Marybeth Feild, president and CEO of the Inland Regional Center. Feild told the Associated Press the shooting unfolded in the building where the library and conference center are located. Officials have not confirmed whether the group renting the conference room was linked to the attack.

"Preliminary information indicates that these people came prepared," San Bernardino police Chief Jarrod Burguan said at the news conference.

The motive behind the shooting was not immediately known, officials said. "We do not know if this is a terrorist incident so we start from the beginning working with our local partners," said David Bowdich, assistant director of the FBI, at the news conference.

Shots were first reported around 11 a.m. PST at the Inland Regional Center. San Bernadino County Sheriff's Deputy Olivia Bozek said no additional shots were heard after authorities responded to the scene, the Los Angeles Times reported. Police detonated a suspicious device found at the facility.

“They’re still trying to evacuate the building,” Bozek said. “Nobody is in custody.”

But witness accounts about an active shooter conflicted with Bozek's comments. Police could not confirm at the news conference if the suspects were still at the scene when responders arrived.

"There's plenty of police activity," Jim, a salesperson at the nearby Structural Material Company, who did not give his full name, told NBC News. "A lady ran into our bathroom and said somebody was shooting there."

The Inland Regional Center employs about 670 people and offers services to 30,000 people with developmental disabilities. Emergency responders treated victims on the scene. Buses evacuated staff and patients from the building.

Several businesses, schools and government offices went into lockdown following the shooting.