Timeline: How the Deadly San Bernardino Shooting Unfolded

san bernardino
A San Bernardino police officer stands near flowers left near the scene of Wedneday's shooting rampage, at the Inland Regional Center, in San Bernardino, California December 3. Jonathan Alcorn/Reuters

San Bernardino is mourning the deaths of 14 people Thursday night, who were all killed when two gunmen opened fire at a county health department holiday party in the southern California city on Wednesday morning. Gunmen Syed Rizwan Farook and Tashfeen Malik were later killed in a shoot out with police, and their motive for the shooting remains unknown.

Related: Identities of 14 Victims of San Bernardino Shooting Emerging

Here is a timeline of Wednesday's events: