Chris Carlson, Associated Press
Melissa Smith prays at a makeshift memorial on Friday, Dec. 4, 2015, in San Bernardino, Calif. A husband and wife on Wednesday, dressed for battle and carrying assault rifles and handguns, opened fire on a holiday banquet for his co-workers, killing multiple people and seriously wounding others in a precision assault, authorities said. Hours later, the couple died in a shootout with police.

SAN BERNARDINO, Calif. (AP) — The latest on the mass shooting in San Bernardino, California (all times local):

11:29 a.m.

The FBI says it is investigating the deadly mass shooting in California as an "act of terrorism."

David Bowdich, assistant director of the FBI's Los Angeles office, made the declaration at a news conference Friday in California.

He also said the shooters attempted to destroy evidence, including crushing two cell phones and discarding them in a trash can. He said authorities continue to investigate the case to understand the motivations of the shooters and whether they were planning more attacks.

10:45 a.m.

The woman who helped her husband kill 14 people at holiday party in California praised the leader of the Islamic State group in a Facebook post just minutes into the attack.

A Facebook executive told The Associated Press that Tashfeen Malik posted the material under an alias account at 11 a.m. Wednesday. That was about the time the first 911 calls came in and when the couple were believed to have stormed into the San Bernardino social service center and opened fire.

The executive spoke on condition of anonymity because this person was not allowed under corporate policy to be quoted by name.

The company discovered the Facebook account Thursday. It removed the profile from public view and reported its contents to law enforcement.

From Associated Press writer Tami Abdollah in Washington, D.C.