In 2017, a total of 1,200 terror-related cases were opened with some 1,000 of them linked to Islamism. In 2016, the Public Prosecutor General opened only 250 terror-related cases with some 200 of them dealing with Islamism, Die Welt media outlet reported.
Earlier in December, a spokeswoman for the German Interior Ministry said that there were 710 potentially dangerous Islamists residing in Germany capable of carrying out a terrorist attack.
German Police Believe Half of 'Dangerous' Islamists Don't Pose a Threat — Report
Germany has been on a high alert amid a series of terrorist attacks across Europe. Last year, a Daesh member Anis Amri stole a truck and drove it into the crowd at a Christmas market in the German capital of Berlin, killing 12 people and injuring 48 others.