As the San Bernardino attack was happening, investigators believe the female shooter, Tashfeen Malik, posted on Facebook, pledging allegiance to ISIS leader Abu Bakr al-Baghdadi, three U.S. officials familiar with the investigation told CNN.

Malik’s post was made on an account with a different name, one U.S. official said. The officials did not explain how they knew Malik made the post.

A law enforcement official said it appeared that Wednesday’s attack — which left 14 people dead and 21 wounded before the two attackers, Malik and her husband, Syed Rizwan Farook, were killed in a shootout with police — may have been inspired by ISIS. But none of the officials said that ISIS directed or ordered the attack.

“This is looking more and more like self-radicalization,” a law enforcement official said.

Another official said authorities haven’t ruled out that others may have influenced this radical view. In addition, the law enforcement source said investigators have a greater focus on whether the shooting occurred after a workplace issue with religion.

Read the article “Investigators: Tashfeen Malik Pledged Allegiance to ISIS Leader in Facebook Posting During San Bernardino Attack” on cnn.com.