"The man in the wanted notice issued by Belgian authorities presented himself to a police station in Antwerp," ministry spokesman Pierre-Henry Brandet told AFP.
An attacker with an automatic weapon opened fire on police in Paris' iconic Champs-Elysees shopping district Thursday night, killing one officer and seriously wounding two others before police shot and killed him.
Police and soldiers sealed off the area, ordering tourists back into their hotels and blocking people from approaching the scene. The Paris prosecutor's office said counterterrorism investigators are involved in the probe.
The attack came three days before the first round of balloting in France's tense presidential election. Security is high preceding the vote after police said they arrested two men Tuesday in what they described as a thwarted terror attack.
In Thursday's attack, French Interior Ministry spokesman Pierre-Henry Brandet said on BFM television that a man came out of a car and opened fire on a police vehicle. He said officers were "deliberately" targeted.
Security forces are more widespread in Paris since deadly Islamic extremist attacks in recent years, and France remains under a state of emergency.