A heavily armed man and woman dressed for battle opened fire on a holiday banquet for his co-workers, killing 14 people and seriously wounding more than a dozen others in a precision assault, authorities said. Hours later, they died in a shootout with police.
Authorities were trying to determine a motive, which could include workplace violence or terrorism.
Wednesday's shooting happened at a social services center for the disabled where the suspect's colleagues with the San Bernardino County Department of Public Health were renting space for a celebration. It was the nation's deadliest mass shooting since the attack at a school in Newtown, Connecticut, three years ago that left 26 children and adults dead.
San Bernardino Police Chief Jarrod Burguan identified one dead suspect as Syed Rizwan Farook, 28, the other as Tashfeen Malik, 27, his wife or fiancee. Burguan said Farook was born in the United States; the chief said he did not know Malik's background.
Local politicians and law enforcement officers in New England took to social media Wednesday to offer condolences.
The Boston Police Department released a statement saying, "The Boston Police Department extends its condolences to the victims and their families affected by the incidents in San Bernardino, CA. As California and federal authorities continue to investigate, our thoughts are with the officers on the front lines of the search for these dangerous suspects."