PARIS — The Belgian authorities have arrested two people in connection with a plot to attack Brussels around New Year’s Eve, prosecutors said on Tuesday.

In a series of raids on Sunday and Monday around Brussels, the surrounding Dutch-speaking region of Brabant and the city of Liège, the authorities found Islamic State propaganda and military-style hardware and computer equipment in the homes of the two suspects.

Investigators say they believe that the two suspects being held “were possibly planning” and “had the intention to carry out” terrorist attacks on Brussels’s city center “in the same style” as the coordinated series of attacks in Paris on Nov. 13, a spokesman for the federal prosecutor’s office said.

No arms or explosives were discovered, prosecutors said. The authorities did not identify the suspects, and they have not established any links to the Paris attacks. Four other people were held for questioning before being released.