SAN BERNARDINO, Calif . — Federal authorities believe the Facebook posting from one of the attackers who killed 14 people here last week was made on behalf of both shooters, according to several senior U.S. law enforcement officials.

The Facebook posting said, “We pledge allegiance” to the leader of the Islamic State, using the name Khalifah Abu Bakr al-Baghdadi Al Qurashi, the emir of the self-proclaimed Islamic State. Some of the text in the posting appeared to be garbled, one official said.

Read the article “BOTH San Bernardino Attackers Pledged Allegiance to ISIS, Officials Say” on washingtonpost.com.