Washington (CNN) President Barack Obama escalated his call that dangerous people not be allowed to obtain high-powered weapons Monday, saying the country needs more "soul-searching" a day after a gunman used a legally purchased firearms to kill 49 people at a nightclub in Orlando.

In remarks in the Oval Office, Obama said the attack was an example of "home-grown extremism" that wasn't carried out at the specific direction of ISIS. He was speaking after receiving a briefing from top law enforcement officials, including FBI Director James Comey.

Comey himself delivered a statement to reporters after the meeting, reiterating the President's position that the individual appeared to be isolated from but inspired by overseas terrorism.

"There are strong indications of radicalization by this killer and of potential inspiration by foreign terrorist organizations," Comey said, adding that he would try not to use the shooter's name. "So far, we see no indication that this was a plot directed from outside the United States and we see no indication that he was part of any kind of network."

Comey also painted a picture of the individual as confused about what terrorist organization he was inspired by, at once declaring loyalty to and sympathy for ISIS, the Boston bombers and a suicide bomber who was working for another group, Al-Nusra, affiliated with Al Qaeda. He also in the past made comments to coworkers about Hezbollah.

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