German authorities arrested a 21-year-old Syrian in Berlin last week for allegedly plotting a chemical attack in Israel, a police spokesperson told German media on Thursday.

The Syrian, who is said to have arrived via Libya with a fake passport and had previously been arrested for theft, was reportedly recruiting terrorists on behalf of ISIS, according to Bild.

Germany's Federal Intelligence Service received a tip from a foreign ally on the suspect and passed on the information to local authorities who began tapping his phone, the German BZ newspaper added. Police said he was also wanted for assault at the time of his arrest.

He was arrested next to a coffee shop in Berlin's Neuköln borough, allegedly over his involvement in a fight. Masked special forces officers armed with machine guns detained him as police blocked nearby roads.

The news of the arrest comes two days after two people were arrested in Copenhagen and charged with attempting to supply ISIS with drones, which the organization has used to carry out attacks, police said.

The two were arrested after police and Danish security and intelligence services carried out raids in Copenhagen, the police said in a statement.

The two persons are suspected of being members of a broader network that ships drones and other supplies to Islamic State from Denmark for use in combat, the police said. The police did not release their names or any details about them.

They were charged with attempting to collude with terrorism abroad and will appear in court on Thursday, the police said in a statement.

Islamic State has increasingly been using drones to carry out attacks in Syria and Iraq.