Following the latest police news conference, here is what we now know about Wednesdays deadly attack in San Bernardino:
14 people have been killed and 17 injured in a mass shooting at the Inland Regional Center, a community center for people with disabilities.
The two attackers were named as Syed Rizwan Farook, a 28-year-old man, and Tashfeen Malik, a 27-year-old woman. Police said they were in a relationship and possibly married.
Both suspects were killed after engaging in a shootout with police while fleeing in a dark-coloured SUV.
The two suspects were armed with assault rifles and handguns, and were dressed in dark clothing loaded with magazines for a gunfight.
A third person who was detained close to the shoot-out has not been identified and it is not certain he was involved in the attack on the center.
Police chief Jarrod Burguan said there had to be some degree of planning in this and multiple explosive devices have been found at the Inland Regional Center.
Farook, an employee of the environmental health team, was involved in a dispute at a Christmas party being held at the center on Wednesday morning, and left before returning to open fire, police said.
Farhan Khan, Farooks brother-in-law, said he had absolutely no idea why his relative would have carried out the massacre.
An FBI official, David Bowdich, said it was too early to class this as an act of terrorism:
"I am still not willing to say if we know that for sure
It is a possibility but we dont know that yet and were not willing to go down that road yet."
FBI agents are still searching a house in Redlands, south-east of San Bernardino, which is connected to Farook.
