PARIS - French prosecutors are seeking a European arrest warrant for a relative of one the Islamist militants who attacked the Paris satirical newspaper Charlie Hebdo last year, a judicial source said on Sunday.
Authorities suspect 20-year-old Mourad Hamyd, who is the brother-in-law of Cherif Kouachi of attempting to join the ranks of Islamic State, the source said, confirming information cited by newspaper Le Journal du Dimanche.
The paper said that the young man, who was being monitored by French security services, was reported missing on July 25 by his family in eastern France. He is being detained in Bulgaria after being turned back at the Turkish border, the JDD added.
France has suffered a series of deadly attacks in the past year that have shown the difficulties faced by the authorities in tracking potential militants.
The Charlie Hebdo attack, in which 17 people were killed, was followed by a coordinated assault by gunmen in Paris in November that killed 130 people.
Last month, a man killed 85 people by ramming a truck into crowds in Riviera city Nice, and then two men killed a priest in a small town in Normandy.
Hamyd had been questioned by police following the Charlie Hebdo attacks but was cleared of any involvement.