A 34-year-old man has been arrested in Germany for allegedly selling weapons reportedly linked to the attacks in Paris.

Prosecutors in Stuttgart said the man, whose name was not given, is accused of converting legal starter pistols to fire live ammunition.

He is accused of selling them on the internet, the dpa news agency reported.

The prosecutor's office would not confirm media reports that he is also suspected of selling four AK-47 type assault rifles.

According to the Bild newspaper the guns were allegedly sold at the beginning of November and may have been used in the Paris attacks.

Citing investigative documents, Bild reported that the man's phone contained data that led to the suspicion.

Meanwhile, two people arrested in Berlin on Thursday had links to Islamic State, which may have been planning an attack in the western city of Dortmund, another German newspaper said.

German police commando units arrested two men, aged 28 and 46, on Thursday suspected of planning an attack and searched a cultural centre, a police spokesman said.

Meanwhile, in Paris, President Francois Hollande has led a national service of remembrance for the victims of the terror attacks there.