BRUSSELS — The former president of Catalonia, Carles Puigdemont, and four former members of his regional government turned themselves in to the Belgian police on Sunday morning, a spokesman for the Brussels prosecutor’s office said.

The spokesman, Gilles Dejemeppe, said that they would be questioned over the next 24 hours by an investigative judge. They were released late Sunday evening, European news services reported, but were prohibited from leaving Belgium without the investigative judge’s permission.

A Spanish judge issued an international arrest warrant on Friday for Mr. Puigdemont and the four former members of his cabinet, who left Catalonia for Brussels. The warrant was sent to the Belgian federal prosecutor.

Mr. Puigdemont told RTBF, a Belgian television broadcaster, on Friday that he was “completely available to cooperate” with the Belgian court system, which he called “the real justice.”