SAO PAULO, Nov. 23 (Xinhua) -- Brazilian President Luiz Inacio Lula da Silva said on Sunday that he was "very concerned" about U.S. military deployment in the Caribbean Sea and planned to talk with his U.S. counterpart, Donald Trump, to prevent conflict with Venezuela.

South America is considered a "zone of peace," free of nuclear weapons, and "there is nothing to justify a conflict," Lula told Brazilian media after attending the Group of 20 (G20) Summit in Johannesburg, South Africa.

"War makes no sense. It's simple to start a war, you just have to give them an opportunity ... It is important that we try to find a solution before we start," he said.

Brazil has an important responsibility in South America, as it shares a border with Venezuela, Lula added.

The U.S. military has beefed up its presence in the Caribbean Sea in recent weeks since Washington announced the decision to crackdown on drug trafficking in the region that allegedly leads to the deaths of millions of Americans. ■