SAN BERNARDINO, CA - DECEMBER 02:  SWAT officers enter an area where suspects were believed to be after the shooting at the Inland Regional Center on December 2, 2015 in San Bernardino, California.  Police continue to search for suspects in the shooting that left at least 14 people dead and another 17 injured.   (Photo by Sean M. Haffey/Getty Images)
1600 rounds of ammunition found in shooter's car
02:12 - Source: CNN

Story highlights

NEW: Coroner releases names of the 14 people killed in the shooting

Syed Rizwan Farook had been radicalized, authorities said Thursday

A social media profile said he "enjoys working on vintage and modern cars"

CNN  — 

So far, nobody knows why a man and woman opened fire with automatic weapons at a holiday party in San Bernardino, California. Fourteen people died, and 21 people were wounded.

We know there were two shooters: A U.S. citizen named Syed Rizwan Farook, 28, who was an inspector with the county health department that hosted the party, and his wife, 29-year-old Tashfeen Malik. They died hours later in a shootout with police.

Was there a connection to terrorist groups? Law enforcement sources say Farook had been in contact with more than one person who had been the subject of an international terrorism investigation by the FBI.

Opinion: Time to silence terrorists on social media

For now, here is what we know and don’t know about the deadliest mass shooting in the United States since December 2012, when 26 people, mostly children, died at Sandy Hook Elementary School in Newtown, Connecticut:

THE ATTACKERS

Farook was a U.S. citizen and an environmental health specialist for San Bernardino County. He had worked there for five years.

He graduated from California State University, San Bernardino, with a degree in environmental health in 2010, school spokesman Joe Gutierrez said. Farook had a profile set up on iMilap.com, which describes itself as “a site for people with disabilities and second marriage.”

The profile said he “enjoys working on vintage and modern cars, reads religious books, enjoys eating out sometimes.”

“Enjoys traveling and just hanging out in the backyard doing target practice with his younger sister and friends.”

Malik was a native of Pakistan who came to the United States on a “fiancee visa” and later became a lawful permanent resident. The couple had a 6-month-old daughter.

On Thursday, law enforcement officials said Farook was in touch over the phone and via social media with more than one person who had been the subject of an FBI international terrorism investigation. It appears that he was radicalized, which contributed to his motive, though workplace grievances might have also played a role, other law enforcemen