FBI looking into shooter's possible involvement with ISIS

FBI investigators work the scene of the July, 16 shooting at the Naval Operational Support Center on Amnicola Highway on Saturday, July 18, 2015, in Chattanooga, Tenn. U.S. Navy Petty Officer Randall Smith died Saturday from wounds sustained when gunman Mohammad Youssef Abdulazeez shot and killed four U.S. Marines and wounded two others and a Chattanooga police officer at the Naval Operational Support Center shortly after firing into the Armed Forces Career Center on Lee Highway.

The FBI is doing a forensic examination on Mohammad Youssef Abdulazeez's cell phone, computer and trips to Jordan to determine if he was involved with ISIS, said Michael McCaul, Chairman of the House Committee on Homeland Security.

The republican congressman from Texas appeared on ABC's This Week on Sunday to talk about ISIS and it's threat to America.

McCaul didn't say whether his office believes right now if Abdulazeez was directly involved or influenced by ISIS, but he did talk about what kind of threats ISIS is to America today.

"We have the threat over the Internet," he said. "Which is a new threat that's out there. A new generation of terrorists."

To attack Americans, ISIS members from Syria "activate people in the United States," he said, targeting military installations and police officers.