Story highlights Accusations are "ludicrous," U.S. State Department spokeswoman says

"We have dismantled a coup attempt," President Nicolas Maduro says in a televised address

He says Venezuela's right-wing opposition groups and the U.S. government were behind the plot

(CNN) Venezuelan President Nicolas Maduro says his government had blocked what he called a U.S.-backed coup plot that included plans to attack the presidential palace with a military jet.

"It is the government of the United States that is behind the plans of destabilization and coups against Venezuela. I have come here to denounce it. ... We have dismantled a coup attempt against democracy, against the stability of our homeland," Maduro said in a televised address Thursday. "It was an attempt to use a group of officials from the air force to provoke a violent act, an attack."

He didn't name which members of the military were allegedly involved, but claimed that the U.S. government and right-wing opposition groups in Venezuela were behind the plan.

U.S. State Department spokeswoman Jen Psaki on Friday dismissed the claims.

"These latest accusations, like all previous such accusations, are ludicrous," Psaki said.