US attack on Venezuela risks ‘Vietnam-style’ regional conflict, warns Lula adviser

Brazil aide says Trump's closure of Venezuelan airspace amounts to an act of war' that could escalate

• Maduro says the real reason for Trump's Venezuela fixation is oil - is he right?

A US invasion or attack on Venezuela could plunge South America into a Vietnam-style conflict, the chief foreign policy adviser to Brazil's president, Luiz Inacio Lula da Silva, has warned.

In an interview with the Guardian, Celso Amorim called Donald Trump's recent decision to order the closure of Venezuelan airspace an act of war", and voiced fears the crisis could intensify over the coming weeks.