FBI Director James Comey said the incident does not meet the agency's definition.
The senator called it a "growing threat to Americans’ privacy and safety."
"This is all 50 states and in ways that are very hard to see," said the FBI chief.
Wouldn't it be great if someone in the federal government made a clarion call about the environment...
Currently, a patchwork of state laws faces companies experiencing a data breach.
FBI director wants Congress to revise law to help police.
Officials have no indications that terrorists are seeking to use Ebola as a biologic weapon.
Director James Comey also told "60 Minutes" he appreciates a distrust of government.
The masked "English-speaking individual" appeared in a propaganda film.
"We have to act as if it’s coming tomorrow,” James Comey said.
The FBI Director said the technology would "allow people to place themselves above the law."
"We have long memories and our reach is very wide," the attorney general said.
Director James Comey said the law also gives the FBI important powers.
“I don’t know enough about where the document sits at this point in time,” James Comey said.
OPINION | One person was noticeably absent from the summit: FBI Director James Comey.
The FBI tells local police departments to keep quiet about the technology.
FBI Director Comey revealed a new link between the Sony hackers and North Korea.
Other officials have pointed to China as the largest threat to cybersecurity.
“Justice may be denied because of a locked phone or encrypted device," Comey said.
Portman blasted President Obama’s plan to track U.S. supporters of ISIS as “reckless.”
China is responsible for the most cyberattacks in the United States, Comey said.
The Obama administration had previously described the threat as "imminent."
The suspect's name was not given.
The FBI will be basing its database on mug shots, James Comey said.