France Finds Potential Terror Accomplice in Handcuffs in Bulgaria

Prosecutor: Warrant says Fritz-Joly Joachim part of terrorist group.

The warrant, Slavova said, did not say how exactly Joachim and Kouachi were in contact.

Monday French officials said they were hunting potential accomplices of brothers Cherif and Said Kouachi, who last week killed 12 people in an attack on the satirical French magazine Charlie Hebdo, and of Amedy Coulibaly, who killed five people and held many more hostage in a kosher supermarket. All three gunmen were killed by police Friday.

Turkish officials said Monday that another individual wanted by French authorities, Coulibaly's romantic partner Hayat Boumeddiene, had slipped into Turkey before the attacks and has since disappeared into Syria.

The news of Joachim's arreset comes as American authorities are putting in place a series of urgent security steps designed to stop what they fear could be another wave of attempted airplane bombings on the heels of the Paris attacks.

U.S. and French officials have said one or both of the Kouachi brothers had received terror training from AQAP prior to their assault in Paris.