Brazil says it will send humanitarian aid to its border with Venezuela by the weekend, despite the protests of embattled president Nicolás Maduro.
The delivery and distribution of the aid is organized by Venezuelan opposition leader Juan Guaidó, the Brazilian presidential spokesman said.
Venezuela also closed its border with the Dutch island of Curaçao.
The Caribbean island, off Venezuela's north coast, is planning to host US aid. Senior Venezuelan military commander Vladimir Quintero confirmed the closure of the Air and Sea Border on Tuesday, but did not give any further details.
The military has so far managed to block shipments of US aid from across the border with Colombia.
Meanwhile, Venezuela's military has reaffirmed its support for President Maduro, rejecting a call by US President Donald Trump to switch allegiance to Mr Guaidó.
Defense Minister Vladimir Padrino, appearing alongside senior officers, said there was an attempt to impose a new government on his body.
He said the armed forces would not US and other countries have recognised Mr. Guaidó as interim president.
The government of President Jair Bolsonaro is among those recognises Mr Guaidó as Venezuela's legitimate leader, pending elections.
Presidential spokesman General Otávio Régo Barros said on Tuesday that, in co-ordination Venezuelan truck driven by Venezuelan "
" Brazil is taking part in this important international initiative to support the Guaidó government and the Venezuelan people, "he said.
However, it is not clear. Mr Padrino warned on Tuesday that the military was "deployed and on alert along the borders … to avoid any violations of territorial integrity."
Mr Guaidó has said there are 600,000 volunteers in the country
Mr. Maduro insists the planned deliveries of aid to Venezuela are a smokescreen for a US led invasion.
In a speech on Monday, President Trump described Mr. Maduro as a "Cuban puppet" and accused a "small handful at the top of Maduro's regime" of stealing and hiding money.
Mr Maduro, saying: "They are risking their future, they are risking their lives and are preparing their lives for the future of Cuban Soldiers. "
On Tuesday Cuba denied it had security forces in Venezuela.
" Our Government categorically and energetically rejects this slander, "Foreign Minister Bruno Rodriguez said in Havana.
What's the background?
Mr Guaidó, head of the country's opposition-led National Assembly, declared himself an interim leader during anti-government protests last month.
He has vowed to oversee fresh elections on the grounds that Mr Maduro's 201
The UN say more than three million Venezuelans have fled in recent years as the country grapples with hyperinflation and shortages of essentials like food and medicine.
19659007] Mr Maduro, who has been in power since 2013, has been criticized at home and abroad for his handling of the economy.
He has, however, retained the support of key allies who helped the country's economy, including Russia and China.