The Moroccan man suspected of launching an attack on a high-speed train in France returned to Europe from Turkey in June, a French prosecutor said Tuesday.

Ayoub El Khazzani, 25, flew from Antakya, Turkey to Tirana in Albania on June 4, said prosecutor Francois Molins. Khazzani denied during interrogation that he had travelled to Turkey, which prosecutors believe may indicate he went to war-torn Syria.