Six other Saudi nationals were detained for questioning near the scene of the shooting, including three who were seen filming the entire incident, according to a person briefed on the initial stages of the investigation. A group that monitors online jihadist activity said that shortly before the shooting, a Twitter account with a name matching the gunman’s posted a “will” calling the United States a “nation of evil” and criticizing its support for Israel.
The gunman was using a locally purchased Glock 45 9-millimeter handgun with an extended magazine and had four to six other magazines in his possession when he was taken down by a sheriff’s deputy, the person familiar with the investigation said.