The Brazilian glass industry is on alert after a major customer announced cashflow problems.

The brewer Grupo Petropolis, which is competitor to the likes of Ambev and Heineken, is more than BRZ4 billion (US$790 million) in debt and has filed for bankruptcy protection with the Brazilian government.

It is a customer of Brazilian container glass manufacturers, which supply bottles to the brewer.

The company owns beer brands such as Itaipava, Crystal and Petra.

The debt amount comprises R$2.2 billion with suppliers and R$2 billion with financial and capital market obligations.