The youngest suspect, 18-year-old Hamid Mourad, turned himself in to authorities Wednesday after learning he was wanted for questioning. Police believe the two suspects that remain at large are brothers, identified as 32-year-old Cherif Kouachi and 34-year-old Said Kouachi.
Both men were listed in an American terrorist database and were on the U.S. no-fly list for years, a senior U.S. intelligence official said Thursday.
Cherif Kouachi had appeared in a 2005 French TV documentary as an aspiring rap musician-turned-jihadist and was convicted of terrorism in 2008 for ties to a network that sends radical fighters to Iraq.
The cleric "told me that (holy) texts prove the benefits of suicide attacks," Cherif Kouachi was quoted as saying in the TV documentary. "It's written in the texts that it's good to die as a martyr."