The Tribunal Ambiental Administrativo confirmed the report Tuesday. It said it has asked for police protection.
The tribunal is the agency that is investigating environmental crimes all over the country and sometimes snags developers and those with homes built illegally in the maritime zone with big fines.
The shooting took place sometime over the weekend. No one was in the offices. A bullet hit the main metal door at the entrance of the offices and in wooden frames around the garage door.
Agents found a spent bullet inside the offices. Shell casing were found outside.
José Lino Chaves, president of the Tribunal said he thought the purpose was intimidation or blackmail.
The Tribunal is an agency of the Ministerio de Ambiente, Energía y Telecomunicaciones.
There was no mistaking the offices because they are marked by a sign.