CARACAS: Cancer-stricken Hugo Chavez struggles with a severe lung infection, and his top aides accused the opposition and the media on Thursday of using the Venezuelan president’s poor health to wage a “psychological war” to destabilize the country.

The hardline stance was adopted after Vice President Nicolas Maduro returned from a visit with the ailing Chavez in Cuba, where he is suffering from complications more than three weeks after undergoing cancer surgery.

Information Minister Ernesto Villegas said that a “severe pulmonary infection” that Chavez developed after the surgery had led to a “respiratory insufficiency” requiring strict adherence to his treatment.

Villegas then leveled the charge that the president’s health had become the target of a campaign to destabilize the government and finish off its socialist revolution.

The government “warns the Venezuelan people about the psychological war that the transnational media complex has unleashed around the health of the chief of state, with the ultimate goal of destabilizing the Bolivarian Republic of Venezuela,” he said in a televised statement.

The statement came amid rising demands at home for a detailed accounting of Chavez’s condition and whether he is fit to take the oath of office January 10 for another six year term.

Venezuela’s constitution calls for new elections to be held within 30 days if the president is unable to take the oath of office or dies during his first four years in office.

But Maduro and National Assembly speaker Diosdado Cabello, the regime’s number two and three leaders, made clear on their return from Cuba that they were not preparing for a transfer of power.

“Here there is only one transition and it began at least six years ago and it was decreed by comandante Hugo Chavez,” Maduro said, referring to the launch in 2006 of the president’s socialist revolution.

Maduro and Cabello spoke on Venezuelan state television, as they toured a coffee packaging plant in Caracas that had been taken over by the state.

Both men went out of their way to deny rumors of an internal power struggle between them, with Maduro saying they had sworn before Chavez that they would remain united.

Referring to the reported rift, Cabello said that the opposition would have to wait “2000 years for that to happen” and said “no conciliation is possible with this opposition.”

Maduro accused the opposition of “lies and manipulation, a campaign to try to create uncertainty.”

“We know that the United States is where these manipulations are being managed,” he said.

“They think that their time has come. And we have entered a kind of crazy hour of offensive by the right, here and internationally.”

It was unclear whether Maduro was referring to US-based Venezuelans or the US government.

Earlier in Washington, State Department spokeswoman Victoria Nuland denied claims that US officials were meddling in Venezuelan affairs, but acknowledged they had been in contact with Venezuelans “from across the political spectrum.”

“There’s no ‘made-in-America’ solution here. This has to be something that Venezuelans have to do,” Nuland said.

Chavez was re-elected October 7 despite his debilitating battle with cancer and the strongest opposition challenge yet to his 14-year rule in Venezuela, an OPEC member with the world’s largest proven oil reserves.

But he has not been seen in public since he underwent a long and complicated surgery 23 days ago for a recurrence of cancer, and officials have acknowledged that his recovery has been difficult.