Chavez died last week aged 58 after a two-year battle with cancer. His body has been on display in a glass-topped coffin at a grandiose military academy in the capital Caracas, where millions of people have filed past to pay homage.

The government had said it planned to embalm Chavez's remains "for eternity" in much the same way as was done with the remains of Soviet leaders Lenin and Stalin and communist Chinese leader Mao Zedong after they died.

"Russian and German scientists have arrived to embalm Chavez and they tell us it's very difficult because the process should have started earlier ... Maybe we can't do it," acting President Nicolas Maduro said in televised comments on Wednesday.

"We are in the middle of the process. It's complicated, it's my duty to inform you."

Government sources said they expected a formal announcement to be made later this week that, despite the efforts of the team involved, it had not been possible to embalm Chavez.
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