German police on Saturday raided an apartment at a shelter for asylum-seekers in the western city of Recklinghausen that they say had been occupied by a man shot and killed as he stormed a Paris police station.
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North Rhine-Westphalia state police said in a statement late Saturday that they were acting on "concrete evidence" they had obtained from French security authorities.
They say the results of the search are still being evaluated with their French counterparts, but that there is no evidence of further possible attacks being planned.
Police said they would not release any further information at the moment to avoid jeopardizing the ongoing investigation.
French investigators are still trying to determine the true identity of the man who was wearing a fake explosives vest and carrying a butcher knife on Thursday as he was killed trying to storm a police station in northern Paris.
Paris prosecutor Francois Molins said Friday that a piece of paper found on the body of the police station assailant pledged allegiance to the leader of ISIS and said "his act is linked to the deaths in Syria." He also had a phone with a German SIM card, the prosecutor said.
The attack occurred on the one-year anniversary of the attack by two Islamic extremists on Charlie Hebdo in which 12 people were killed at the satirical newspaper's office.