RIO DE JANEIRO, Brazil — Investment firm Blackstone Group LP on Sunday said it is not considering an acquisition of Brazilian shopping mall operator BR Malls Participacoes SA, denying a report published early in the day by newspaper O Globo.

"We are not actively engaged in acquisition discussions for BR Malls," Blackstone said in an emailed statement.

The Brazilian newspaper, without citing sources for its information, said early Sunday that Blackstone had hired JP Morgan Chase & Co. to help it consider acquiring a controlling stake in BR Malls, which is based in Rio and is Brazil's biggest mall operator.

The paper said the acquisition would amount to Brazil's biggest-ever real estate transaction and would be valued at as much as 12 billion reais ($3.38 billion).

A spokeswoman for BR Malls, which is based in Rio and is Brazil's biggest mall operator, declined to comment on the report.

A spokeswoman for JP Morgan Chase also declined to comment.

By: Paulo Prada and Guillermo Parra-Bernal; editors: Jonathan Oatis and Andrew Hay.

Editor's note: This article was updated on 3 April 20156, to include Blackstone Group's response to the report.