CARACAS, Sept. 1 (Xinhua) -- Venezuelan President Nicolas Maduro said Monday that his country is facing "the biggest threat our continent has seen in the last 100 years" as the United States steps up its naval presence near the country's territorial waters.

At a press conference, Maduro called the U.S. move an "unjustifiable" and "absolutely criminal threat."

He said eight U.S. Navy ships carrying 1,200 missiles and one nuclear submarine were targeting Venezuela.

The United States has advanced what they call "maximum pressure," this time through military means, and in response Venezuela has declared maximum readiness to defend the nation, Maduro emphasized.

Maduro insisted Venezuela would not yield to "blackmail and threats," adding that the country is peaceful but would fight to defend its territory if attacked. He announced a nationwide program to train civilians and establish a Communal Militia Combat Unit to strengthen the country's defenses.

He rejected U.S. drug-trafficking allegations against his government, stressing that Venezuelan security forces have intercepted large drug shipments and neutralized hundreds of aircraft used by criminal groups.

Maduro said that the existing channels of communication with the U.S. government are "broken," but Venezuela always maintains its diplomatic and dialogue channels open.