WASHINGTON -- Investigators have identified Muhammad Yousef Abdulazeez, 24, as the gunman behind Thursday's attacks on military centers in Chattanooga, Tennessee. Late Thursday investigators sealed off the home where law enforcement sources say Abdulazeez lived. It's located in Hixson, Tennessee, which is about two miles and a few minutes away from where the shootings occurred.Federal law enforcement officials say Abdulazeez was born in Kuwait and became a naturalized U.S. citizen. His father is from Nablus in the West Bank and his mother is from Kuwait.
He was not on any U.S. terror list and the FBI was not aware of his having any terrorist leanings. Abdulazeez had been stopped by local police in April when he was booked for a DUI.
Officials will now go through his computers and any social media postings as they try to determine what motivated the gunman to act. The FBI's Ed Reinhold is leading the investigation.
"We're going to do an intense look at him to see what his connections are," said Reinhold. "We'll look at his friends, family, associates -- anybody who is associated with him to determine the cause or the reason why he conducted this attack."
Officials will try to find out if Abdulazeez was motivated or influenced by ISIS.
The group has been calling for "
Homeland Security Secretary Jeh Johnson has called for increased security at "certain federal facilities," out of an abundance of caution.
A week ago FBI Director James Comey said agents had made arrests to thwart Fourth of July attacks, but also acknowledged the challenges of tracking the thousands who follow ISIS on social media.