Story highlights FBI Director James Comey says there are more terrorist organizations desiring to attack U.S. than there were at 9/11

Terrorists' ability to have a safe haven increases their ability to mount a sophisticated attack against the U.S., he added

Washington (CNN) FBI Director James Comey said Wednesday that the U.S. is at its greatest threat level from terrorist groups since 9/11.

Comey shared the information at a Senate FBI oversight hearing after Sen. Lindsey Graham questioned him on his agency's knowledge of terrorism.

"Do you agree with the following statement: There are more terrorist organizations with men, equipment and safe havens, along with desire to attack the American homeland, anytime since 9/11 ?" the South Carolina Republican asked.

"I agree," Comey said.

Comey said budget cuts imposed by Congress in recent years have reduced the FBI's ability to protect America from terrorism.

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