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Video has emerged showing the scene inside the building where the San Bernardino shooting took place.
Gabi Flores, an employee at the Inland Regional Center, recorded the moment when police officers escorted people to safety.
The footage shows people holding their hands up while walking to a safe point in the building.
The officer escorting the group can be heard saying: “Try to relax. I'll take a bullet before you do, that's for damn sure.”
At least 14 people were killed on Wednesday afternoon when a couple armed with assault weapons opened fire at a social services agency Christmas event.
Authorities have identified the couple as Syed Rizwan Farook, 28, and his wife Tashfeen Malik, 27.
Jarrod Burguan, the San Bernardino police chief, said Farook attended the Christmas party – stormed out and later returned to open fire.
In pictures: San Bernardino shootingShow all 15 1 /15In pictures: San Bernardino shooting In pictures: San Bernardino shooting A couple embraces following a shooting that killed multiple people at a social services facility, in San Bernardino
In pictures: San Bernardino shooting A victim is wheeled away on a stretcher following a shooting that killed multiple people at a social services facility, in San Bernardino
AP
In pictures: San Bernardino shooting Rescue crews tend to the injured in the intersection outside the Inland Regional Center in San Bernardino
Reuters
In pictures: San Bernardino shooting A survivor (2nd L) of the mass shooting at the Inland Regional Center meets her family after police questioning in San Bernardino
Rex
In pictures: San Bernardino shooting An armed police officer protects a busload of people who were inside the Inland Regional Center where gunmen shot and killed 14 people and injured another 14, to be escorted to meet relatives at the Rudy Hernandez Community Center in San Bernardino
Reuters
In pictures: San Bernardino shooting People wait at a community center for a family member who was near a shooting that killed multiple people at a social services center, in San Bernardino, California
AP
In pictures: San Bernardino shooting In this image taken from video, armored vehicles surround an SUV following a shootout in San Bernardino
AP
In pictures: San Bernardino shooting Law enforcement officers search for the suspects of a mass shooting in San Bernardino
Getty Images
In pictures: San Bernardino shooting Law enforcement officers search for the suspects of a mass shooting in San Bernardino
Getty Images
In pictures: San Bernardino shooting The Inland Regional Center complex is pictured in an aerial photo following a shooting incident in San Bernardino
Reuters
In pictures: San Bernardino shooting Authorities prepare to search an area near a church, following a shooting that killed multiple people at a social services center for the disabled in San Bernardino
AP
In pictures: San Bernardino shooting Evacuees from the scene of a shooting at the Inland Regional Center hug each other as they wait inside the Rudy C Hernandez Community Center in San Bernardino
EPA
In pictures: San Bernardino shooting Omar Riopedre embraces his wife Diana, who was in the Inland Regional Center when the mass shootings took place, as they leave the Rudy C. Hernandez Community Center in the San Bernardino
In pictures: San Bernardino shooting A Sheriff's Deputy runs after reports that suspects in the shooting at the Inland Regional Center were sighted in San Bernardino
EPA
In pictures: San Bernardino shooting Law enforcement officers search for suspects in a neighborhood after a shooting at the Inland Regional Center in San Bernardino
EPA
In 2015, there have been more than 350 shootings in which four or more people were wounded.
In the wake of the shooting, President Obama has repeated his call for stronger gun control.
“The one thing we do know is that we have pattern now of mass shooting in this country that has no parallel anywhere else in the world.”
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