Investigators believe the woman suspected in the killings of 14 people in San Bernardino, Calif., pledged her support to the Islamic State in Iraq and Syria (ISIS) during the attack, according to multiple reports.
Three officials told CNN that Tashfeen Malik, 27, made a Facebook post as the attack was happening pledging her allegiance to ISIS leader Abu Bakr al-Baghdadi.
The post was made on an account by a different name, one of the officials said. It is not clear how they know the post came from Malik.
Malik and her husband, Syed Rizwan Farook, 28, are suspected of storming an office building on Wednesday, where 14 people were killed and 21 others were wounded. The couple was later killed in a shoot-out with police.
Authorities have been trying to determine the motive behind the attack, with questions raised about whether the shootings were an act of terroristm, workplace violence or some kind of combination.
The killings did not fit neatly into the patterns of Islamic terrorism; the target in this case was a small county government site in a relatively unfamiliar part of the country.