A 28-year-old Moroccan man was arrested on Wednesday evening after being stopped during a routine identity check at Giessen railway station, north of Frankfurt.
His mobile phone was initially thought to contain the name of Khalid el Bakraoui, who Belgian officials say blew himself up on Tuesday at the Maalbeek metro station in Brussels, Berlin public broadcaster RBB reported, citing intelligence sources.
It has been reported that the arrested man was in fact exchanging messages with someone with a name spelt almost the same as Bakraoui's.
Another man, a follower of the ultra-conservative Salafi strain of Islam, was arrested Thursday in the Duesseldorf region in western Germany on suspicion of links to one of the Bakraoui brothers.
More From This Section
A search of his house and workplace along with scrutiny of his mobile phone failed to produce any evidence tying him to the attacks in Belgium that killed 31 and injured 340, police told the DPA news agency.
The man remains in detention pending further inquiries, police added.