Puigdemont and four former ministers were released with conditions Sunday night after turning themselves in to Belgian authorities to face a Spanish warrant for their arrest on charges of rebellion and sedition.
"Released without bail. Our thoughts are with colleagues unjustly imprisoned by a state that is far from democratic norms," Puigdemont said on Twitter hours after the five were released Sunday night.
A Spanish judge in Madrid had on Thursday put Puigdemont's deputy and seven other deposed regional ministers behind bars because of a risk they would flee.
Belgium's Foreign Minister Didier Reynders insisted it was a legal matter and not one for politicians to deal with, despite recent criticism of Spain from some Flemish separatist members of his own government.
"We must let the Belgian and Spanish courts do their work," Reynders told his country's media.
Puigdemont and his allies escaped to Belgium last Monday after Spain dismissed the Catalan executive and imposed direct rule on the semi-autonomous region following the declaration of independence by the parliament there last month.
Spain issued European arrest warrants on Friday after Puigdemont and his allies ignored a summons to appear before a judge on allegations linked to the move to declare Catalonia an independent republic.
Puigdemont's PDeCAT party said Sunday that he had turned himself in to show his "willingness not to flee from the judicial process but to defend himself in a fair and impartial process, which is possible in Belgium, and highly doubtful in Spain".
The next court hearing will be in the following 15 days. Belgium has up to 60 days to decide whether to send the Catalans back to Spain.
Puigdemont has said he and his colleagues -- Meritxell Serret, Antoni Comin, Lluis Puig and Clara Ponsati -- would cooperate with the Belgian authorities.
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