Inland Regional Center, scene of San Bernardino shooting
Inland Regional Center, scene of San Bernardino shootingReuters

The female shooter in the San Bernardino shooting, Tashfeen Malik, pledged allegiance to Islamic State (ISIS) leader Abu Bakr Al-Baghdadi on Facebook, three American officials familiar with the investigation told CNN on Friday.

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

A law enforcement official said it appeared that Wednesday's mass shooting -- 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. ISIS has called for people worldwide to launch attacks in its name, but isn't known to have claimed credit for what happened in San Bernardino, according to CNN.

On Thursday, it was reported that Farook had been in contact with terrorists and Saudi Arabia also confirmed he had visited the country in 2014.

Investigators said that Farook was in touch by phone and social media with more than one international terror suspect, without specifying what terror groups they belonged to.

"This is looking more and more like self-radicalization," a law enforcement official told CNN on Friday.

Neither Farook nor his wife had gotten into trouble with the law, according to police. And neither was on any list of potentially radicalized people.

But it's not known what connections Malik, who was born and raised in Pakistan and moved to Saudi Arabia around the age of 19, had with any terrorists or groups before the San Bernardino massacre.

Investigators are exploring Farook's communications with at least one person who was being investigated for possible terror connections. Some were by phone, some on social media.

"These appear to be soft connections," an official told CNN, meaning they were not frequent contacts. Farook's last communication with the contacts was months ago.

(Arutz Sheva’s North American desk is keeping you updated until the start of Shabbat in New York. The time posted automatically on all Arutz Sheva articles, however, is Israeli time.)