Yesterday at 11 a.m. local time, three individuals dressed in “assault clothing” opened fire outside the Inland Regional Center in San Bernardino, CA. The gunmen–wielding AR-15 assault rifles, several rounds of ammunition, pistols and a pipe bomb–killed at least 14 people and injured 17 more. 

When the suspects peeled away from the scene in a black SUV, local police and SWAT pursued them through the city. A shootout between law enforcement and the gunmen ensued, resulting in the deaths of two shooters. The third was arrested.

The Inland Regional Center is a nonprofit organization that helps people with developmental disabilities. A later sweep of the building uncovered an explosive hidden inside.

Since the horrific shooting occurred, the media has reported the names of the two shooters killed by police. They were a married couple named Syed Rizwain Farook and Tashfeen Malik. According to police, they left their six-month old daughter with her grandparents shortly before packing their SUV with weapons and heading to the Inland Regional Center.

The third suspect has yet to be named by the police or media. The victims identities also have not been released.

As for Farook and Malik’s motives, investigators are stumped. Unlike every other shooter from the last six or so months (Robert Dear of Colorado Springs, Chris Harper-Mercer of Umpqua Community College, Muhammad Youssef Abdulazeez of Chattanooga, Dylann Roof of Charleston, etc.), there are no online profiles, blog posts or manifestos indicating that either gunman was radicalized or harbored a hatred for another group. In an age where everyone leaves a distinct online trail, Farook and Malik are unique.

Farook’s coworkers have said that he was “quiet and polite, with no obvious grudges.” Even his own family is astonished that the couple, who had only been married for two years, would commit such violence.

“I just cannot express how sad I am for what happened today,” Farook’s brother-in-law Fahran Khan said at a press conference. “I am in shock that something like this could happen.”

San Bernardino Police Chief Jarrod Burguan said that though the people who knew Farook and Malik did not see this coming, the shooting was definitely premeditated.

“These people came prepared to do what they did as if they were on a mission,” Burguan said. “They were armed with long guns, not with handguns.”

Investigators have not yet ruled out terrorism.

UPDATE: The third suspect arrested at the scene was not involved in the shooting. Apparently, the individual was simply in the wrong place at the wrong time.