German authorities are under fire after it emerged that the prime suspect in Berlin's deadly truck attack, a rejected Tunisian asylum seeker, was known as a potentially dangerous jihadist. German officials say, they have been investigating Amri, suspecting he was planning an attack. But after keeping tabs on him, they failed to find evidence of the plot and the surveillance was stopped.<br/><br/>German prosecutors have issued a Europe-wide wanted notice for 24-year-old Anis Amri, offering a 100,000 euro reward for information leading to his arrest. But as the manhunt intensifies, questions are also raised about how the suspect had been able to avoid arrest and deportation despite being on the radar of several security agencies.<br/><br/>The attack, Germany's deadliest in recent years, has been claimed by the Islamic State group. Twenty-four people remain in hospital, 14 of whom were seriously injured.