Police spoke to the suspect in the deadly car attack at a Christmas market in Germany several weeks before the attack, DPA reported, citing local authorities.
The attack in the city of Magdeburg last Friday, which killed five people and injured 235 - is believed to have been carried out by a Saudi national identified only as Taleb A, as required by German law.
Investigators are trying to establish his motives amid suggestions that authorities failed to heed warnings about the perpetrator.
The interior minister of Saxony-Anhalt state, Tamara Zissang, told lawmakers in Magdeburg on Monday that police had spoken to the suspect twice - once in September 2023 and October 2024 to warn him about his behavior.
The first conversation took place at the police station in Salzland near Magdeburg, and this year's meeting was at the suspect's workplace.
Zishang did not publicly comment on the background to the meetings, but told members of the state parliament that he would present details during a closed session of the Saxony-Anhalt parliament.