The Environment Ministry is temporarily banned from moving forward with zoo conversions in San José.
FUNDAZOO's lawyer says MINAE entered the zoo's property without permission.
Environment Minister René Castro wants to set all of his country's wild animals free.
Three activists were arrested during the demonstration in front of the zoo on Sunday.
Animal rights activists are celebrating the Environment Ministry's decision to close Costa Rica's two public zoos next May. However, zoo administrators are not going out without a fight and plan to take the case to court.
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