French police officials say they have identified three men as suspects in a deadly attack against newspaper offices that killed 12 people and shook the nation.
Two officials named the suspects as Frenchmen Said Kouachi and Cherif Kouachi, in their early 30s, as well as 18-year-old Hamyd Mourad.
One of the officials said they were linked to a Yemeni terrorist network.
The officials spoke on condition of anonymity because they weren't authorized to publicly discuss the sensitive and ongoing investigation.
Cherif Kouachi was convicted in 2008 of terrorism charges for helping funnel fighters to Iraq's insurgency and sentenced to 18 months in prison.
It was the deadliest attack in France in half a century.
The U.S. Homeland Security Secretary Jeh Johnson has not said whether he will consider raising the terror threat in the U.S.
University of Kansas Associate Dean for International and Comparative Law Raj Bhala said that this attack can affect American communities by people misunderstanding the attacks and backlashing.
"If people (Americans) wrongly misunderstood that these killers were representing authentic Shari'a teaching, which they're not, and started acting untowardly towards people of other faiths including Islam, so extremism can beget extremism and that's what we don't want to see," Bahala said.
Bhala went on to say that he was encouraged that both the Arab League and Al-Azhar University condemned the attacks.