Venezuela's President Hugo Chavez is
undergoing his "most difficult hours", his
deputy has said.
Nicolas Maduro spoke at length in a speech
apparently designed to reassure citizens
despite the failing health of Venezuela's leader.
He accused the US of plotting against the
Venezuelan government: Two US military
attaches have been expelled.
On Monday, officials said the 58-year-old
Venezuelan leader had a new, severe
respiratory infection.
Dozens of people gathered to pray for his
health at the hospital where Mr Chavez is being
treated.
He has not appeared in public since he
returned to Venezuela last month after being
treated for cancer in Cuba.
'Attack' on president
The address, broadcast live on TV from the
presidential Miraflores Palace, showed Mr
Maduro surrounded by political and military
leaders in a display of solidarity.
He accused "enemies of the fatherland" in
Venezuela and abroad, particularly the United
States, of seeking to undermine democracy in
Venezuela.
Speaking in a room full of dignitaries including
the defence minister and the president's
brother, Adan Chavez, Mr Maduro said Mr
Chavez's illness was an "attack" by his enemies
and called for this to be investigated.
He said one US Air Force attache, David
Delmonico, had been spying on Venezuela's
military and had 24 hours to leave the country.
Venezuela's foreign minister, Elias Jaua, later
announced the expulsion of a second US Air
Force attache, Devlin Kosta.
US Department of Defense spokesman Lt Col
Todd Breasseale later confirmed Col
Delmonico was "en route back to the United
States".
"We completely reject the Venezuelan
government's claim that the United States is
involved in any type of conspiracy to destabilize
Venezuela government.," said Lt Col
Breasseale.
"Further, we absolutely reject the specific
allegations leveled by the Venezuelan
government against Air Attache David
Delmonaco and Assistant Air Attache Devlin
Kostal."
Col Breasseale confirmed Assistant Air Attache
Devlin Costal, who is currently in the US, would
not return to Venezuela.
In recent days, the opposition have condemned
what they say is the lack of clarity surrounding
Mr Chavez's condition.
"The lack of precise information worries
Venezuelans and fuels rumours," said Ramon
Guillermo Aveledo of the opposition
Democratic Unity coalition.
At the weekend, hundreds of Venezuelan
students and opposition members marched in
Caracas demanding full details about Mr
Chavez's health.
Information Minister Ernesto Villegas accused
Mr Chavez's opponents of showing "the same
hatred that they have shown towards Chavez all
these years.
"It annoys them that he won't give up and
neither will the people!," he wrote on his
Twitter account.
On Monday Mr Villegas announced from the
military hospital where Mr Chavez is being
treated that he had suffered "a worsening of
respiratory function" and that his condition
continued to be "very delicate".
He said Mr Chavez was undergoing "intensive
chemotherapy, as well as complementary
treatments".
"The commander-president remains clinging to
Christ and to life, conscious of the difficulties
that he is facing, and complying strictly with the
programme designed by his medical team," Mr
Villegas said.
Mr Chavez, who has been in office for 14 years,
is believed to have cancer in his pelvic area,
but his exact illness has never been disclosed.
He announced in June 2011 that he had cancer
and has undergone four operations since then,
as well as chemotherapy and radiation therapy.
The president was re-elected for another six-
year term in October 2012, but the Supreme
Court ruled that his swearing-in on 10 January
could be delayed because of his illness.
He is said to be taking decisions about the
country from the hospital bed but there have
been mixed messages from officials on his
condition.