Samuel Bahri, 28, a Pakistani who fled to Germany from Somalia in 2008, arrived back in Germany on Friday. He told AFP his relatives were afraid to leave the home.

“I don’t know what will happen, if we get another attack somewhere. I hope that after these attacks, there will be a national debate on immigration in Germany.”

On Thursday, a knife-wielding man, who claimed to be inspired by Isis, killed nine people in a shooting at a train station on the Bavarian town of Wuerzburg. He had also been linked to more than 160 recent attacks.

In the eastern German state of Saxony, a train station in Chemnitz was attacked with at least three explosives in what was described as “a terrorist incident”.

It comes as German police arrested five suspected radicals from Chemnitz who are suspected of planning a major assault on a major city in Germany.

In Paris, a man who was killed in a police raid on Thursday evening had been monitored for months by French intelligence, local media reported.

Paris police said they had obtained information that the suspect was one of two people who had been plotting attacks on the city for months.

The news comes after an Islamic State terrorist drove his van into pedestrians on the Promenade des Anglais, a popular tourist spot, killing himself and injuring 11 people.