San Bernardino, California (CNN)With the investigation still unfolding, much is unclear about Wednesday’s deadly San Bernardino shooting at a center for people with developmental disabilities.

See latest developments[Update 12:22 a.m ET Thursday]The family has not been able to track down recently named suspect Syed Farook or his wife since Wednesday morning, said Hussam Ayloush, executive director of CAIR (the Council on American Islamic Relations).

[Update 12:02 a.m ET Thursday]Farhan Khan, the brother-in-law of the suspect Syed Farook, told reporters: “I have no idea why he would he do something like this. I have absolutely no idea. i am in shock myself.” Khan said he last talked to Farook a week ago.

[Update midnight ET]ATF tells CNN that one of the guns used in the shooting was legally purchased and traces back to someone believe to be connect with the shooting. The agency would not disclose the name of the purchaser.

[Update 11:56 p.m. ET Wednesday]One of the suspects involved in the San Bernardino shootings has been identified as Syed Farook, an inspector with the county health department, who abruptly left the event at the Inland Regional Center before the shootings, multiple law enforcement sources tell CNN.

The sources said the residence in Redlands, California, surrounded by law enforcement is connected to Farook. It is that house where the chase began that led to the shootout with the occupants of the SUV.The sources could not say for certain that he was in the SUV, if he was a shooter, or that he is one of the dead The sources did say that Syed Farook is known to be a U.S. citizen.

[Previous story 11:56 ET]Two suspects died in a gun battle with police Wednesday hours after authorities say they burst into a holiday party at a center for people with developmental disabilities and killed 14 people.

But it was unclear whether the furious shootout with the male and female suspects was the end of a daylong manhunt after the mass shooting at the Inland Regional Center in San Bernardino.

An FBI raid was unfolding late Wednesday at an apartment in Redlands, where authorities were serving a search warrant connected to the shooting.

Mass shooting The violence began around 11 a.m. at the convention building at the Inland Regional Center where employees with the county health department were attending a holiday event.

Witnesses said at least two shooters opened fire, killing 14 people.San Bernardino: Full coverageWhat we know: The latestWho were the shooters?Fear at the scene: ‘A shooter @ work’Social media mourns and praysWhat is the Inland Regional Center?In mass killings, multiple shooters rareTabloid’s cover:

‘God isn’t fixing this’Complete coverageAnother 17 people were hurt — many wounded by bullets from automatic-style rifles, some injured in the panic to escape.The shooters fled in a black SUV, prompting a huge police response in the area.As the hours passed, the hunt for the suspects continued with a tip taking officers to a home about 10 miles away in Redlands.When detectives followed up on it, a black SUV with Utah plates passed by slowly then sped up and raced off, a law enforcement official close to the investigation told CNN. A police car spotted it and took up pursuit.There was a shootout, the official said. The male suspect shot out of the vehicle while the woman drove. The SUV stopped a quarter a mile later, as an officer returned fire.A device that looked like a bomb also flew out of the vehicle, Meredith Davis with the Bureau of Alcohol Tobacco and Firearms and Explosives told CNN affiliate KCAL/KCBS. The SUV was racing back toward San Bernardino, she said.

Source: 14 killed in San Bernardino shooting; suspect ID’d – CNN.com