The media were granted access to the Redlands home, where they rushed in and went through personal effects, which included photo IDs and a wide array of documents and photographs - in addition to the couple's baby toys.
The two young suspects of California shooting are of Pakistani origin, media reports have said even though President Barack Obama has asked people not to rush to a conclusion.
"San Bernardino involved two killers who were radicalised for quite a long time before their attack," FBI Director James Comey said.
Law enforcement officials in San Bernardino said they could not rule out terrorism as a possible motive for the mass killings at a centre for people with disabilities that left 14 people dead and 17 others injured.
Leading Republican presidential candidate Ted Cruz supported the FBI on the issue.
A 'soft' approach must be nurtured to complement the hard-line of spending billions in physical conflict; that is the only way to 'degrade and destroy' ISIS.
A $28,500 deposit was made to the account of slain gunman Syed Farook, a media report has said.