ROME (AP) — Italy's interior minister says Tunisian Anis Amri moved like a "lone wolf" while traveling through Italy after fleeing the Berlin truck attack.

Minister Marco Minniti's remarks to reporters Friday bolstered Italian investigators' findings so far indicating that the 24-year-old fugitive — the prime suspect in the Dec. 19 Berlin attack that killed 12 people — lacked any significant contacts in Italy as he fled.

Minniti said that "from when he arrived in Italy, Amri moved like a lone wolf" while a fugitive.

Amri had spent 3½ years in prisons in Sicily before eventually winding up in Germany after Italy tried unsuccessfully to expel him to Tunisia following his 2105 release from prison.

Amri died in a shootout with Italian police on Dec. 23 outside a suburban Milan train station.