FBI Director James Comey on Thursday said there was no "credible threat" of a Paris style attack occurring on US soil, while noting that the agency intensified its terrorism investigations.
After the attacks claimed by DAESH terrorist group, a Syrian passport was found near the body of one of the perpetrators of the attack.
The French authorities' discovery of the passport has ignited concerns that at least one of the perpetrators might have entered Europe along with the thousands of Syrians fleeing the civil war in their country.
These concerns were reflected in the US, and at least 30 governors announced they will not resettle refugees in their states.
However, Comey said "We are not aware of any credible threat here of a Paris-type attack and we have seen no connection at all between the Paris attackers and the United States.”
Comey and Attorney General Loretta Lynch said US authorities are cooperating with their French counterparts and investigating every suspicious activity that may relate to terrorism.
The FBI chief said, following the deadly attacks, FBI has taken investigations “up to notch.”
Comey said instead of fearing from terrorism, US citizens have “healthy awareness” and report anything suspicious to the law enforcement.
"That is channeling fear into something healthy, which is awareness of your surroundings, and not something disabling," Comey said. "That's what we hope you will do."
"Do not let fear become disabling. That is what the terrorists want. They want you to imagine them in the shadows, they want you to imagine them as something greater than they are," Comey added.
Comey also said Republican-backed legislation to suspend Obama’s plan to resettle 10,000 Syrian refugees in next year is impractical and impossible.
In the aftermath of the Paris attacks, the United States House of Representatives on Tuesday voted and passed a bill that will tighten the refugee screening process.