Brazil will boost its military presence in the Amazon region to protect its huge natural resources from any external threat, Defense Minister Celso Amorim told the Senate Thursday.

"The commitment to the defense of the Amazon is fundamental. Navy, Air Force, all services will boost their presence in the Amazon in the next few years," he said without giving further details.

Amorim said Brazil did not feel threatened by any neighboring country but added: "We cannot rule out that some power from outside the region" may covet the natural resources of the Amazon, the planet's largest rainforest and its main source of fresh water.

"We are working on a plan to deploy (security) forces and the Amazon plays a very important role. It's the most vulnerable part of our country," Amorim said.

"We have a wealth of resources which can make us the target of adventures," he added.

Amorim said the country's strategic planners were planning to boost "transparent cooperation" with other Amazon countries, referring to plans to set up a security commission with Peru and Colombia.

"We do not feel threatened by any South American countries and we do not want anyone to feel threatened by us. We always want full transparency to avoid suspicions," the minister said.

Brazil, Latin America's largest country and the world's sixth largest economy, shares the sprawling Amazon with Bolivia, Colombia, Ecuador, Guyana, Peru, Suriname and Venezuela.

Brasilia is also boosting its naval power in the South Atlantic with a ambitious submarine program to protect its huge deep-water oil reserves and project its growing influence.

Under the National Defense Strategy unveiled in 2008, the navy was tasked with developing a blue-water force to protect Brazil's huge sub-salt oil reserves, the Amazon river basin and its 7,491 km (4,655 miles) coastline.

The sub-salt oil fields, located off the country's southeast Atlantic coast beneath kilometers of ocean, bedrock and hot sat-beds, could contain more than 100 billion barrels of high-quality recoverable oil, according to official estimates.

The centerpiece of the naval buildup is the ProSub program under which France is to supply four Scorpene-class diesel-electric submarines and help develop the non-nuclear components of Brazil's first nuclear-powered fast attack submarine.