Minister of the Supreme Federal Court of Brazil Alexandre de Moraes ruled that the national police should enforce search warrants for eight entrepreneurs who exchanged messages expressing support for the coup, the G1 news portal reported.
The operation was conducted on Tuesday in five states, the report said.
Moraes also instructed to block the suspects' bank and social media accounts, it added.
The entrepreneurs' lawyers said that their clients had become the victims of false and irresponsible media reports, according to the news portal.