In this photo released by Miraflores Press Office, Venezuela's President Hugo Chavez delivers a speech at the Miraflores presidential palace in Caracas, Saturday, March 21, 2009. Falling oil prices are pushing Venezuela to boost sales taxes, sell debt and revise its 2009 budget to reflect an expected 6.7 percent decrease in income, President Hugo Chavez said. (AP Photo/Miraflores Press Office) ** NO SALES **
Chavez had planned to attend the inauguration of leftist President Mauricio Funes in the Central American nation on Monday, but canceled his trip due to the alleged plot.
He said Venezuelan intelligence services have "very precise information" that they were planning to launch rockets at the Cubana de Aviacion plane he was going to travel in.
Venezuela has asked the U.S. to extradite Posada, an opponent of former Cuban president Fidel Castro and a former CIA operative accused of plotting the 1976 bombing of a Cuban plane in Venezuela that killed 73 people on board. The 81-year-old Posada denies involvement in the bombing.
Chavez has repeatedly accused the U.S. of plotting to overthrow him or to invade Venezuela, without offering proof. The U.S. State Department has denied such accusations in the past.
Nobody at the U.S. Embassy in Caracas was immediately available to comment Tuesday.