The enemy who killed 14 people and bleeding 21 during a amicable services centre in California had an arsenal of weaponry in their home, military said.
Bomb equipment, weapons and thousands of rounds of ammunition were found by military in a raid after a shootout that killed a dual suspects.
Authorities still have not found a ground in a conflict by Syed Rizwan Farook, 28, and Tashfeen Malik, 27.
Police pronounced a conflict indicated there had been “some grade of planning”.
San Bernardino Police Chief Jarrod Burguan pronounced it seemed that a twin was prepared to lift out another attack.
“There was apparently a goal here. We know that. We do not know why. We don’t know if this was a dictated aim or if there was something that triggered him to do this immediately,” pronounced David Bowdich, partner executive of a FBI’s Los Angeles office.
In a shootout with military hours after a attack, Farook and Malik dismissed 76 rounds of ammunition during a officers and a officers dismissed 380 rounds back.
Two military officers were harmed during a pursuit.
It outlines a deadliest mass sharpened in a US given 26 people were killed during a propagandize in Newtown, Connecticut in 2012.
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Authorities are approaching to start releasing a names of a victims on Thursday.
President Barack Obama pronounced a FBI had taken over a review from internal authorities.
“It is probable that this was terrorist-related, though we don’t know. It’s also probable that this was workplace-related,” he said.
“We’re going to have to hunt ourselves as a multitude to make certain we can take simple stairs that would make it harder – not impossible, though harder – for people to get entrance to weapons.”
Law coercion officials are also looking during probable “co-conspirators” and have been in hold with a suspects’ relatives.
Farook, who was innate in a US, was not “on a radar” of law enforcement, Mr Burguan said.
He worked for a past 5 years as a grill examiner for a San Bernardino County Health Department. The Los Angeles Times reported that co-workers pronounced he was a righteous Muslim though frequency discussed his religion.
He and Malik were recently married and had a six-month-old baby, who they forsaken off during a grandmother’s residence before a attack.
On Wednesday, Farook and his colleagues were attending a holiday celebration during a Inland Regional Center.
Co-worker Patrick Baccari pronounced he was sitting during a same list as Farook before he abruptly left, withdrawal his coat.
Wearing military-style wardrobe and armed with attack rifles and semi-automatic handguns, Farook returned with Malik a brief time after to open fire.
When a sharpened started, Mr Baccari took retreat in a lavatory and was harm when shrapnel sliced by a wall.
“If we hadn’t been in a bathroom, I’d substantially be laying passed on a floor,” he said.