"I wish to inform the nation that the president had suffered a stroke, " Zambian Vice-President Rupiah Banda said in a statement.
Dave Banda added a third after 49 minutes to end any thoughts of an Algeria comeback.
Privately, western diplomats here are warning of the possibility of economic collapse, and a backlash against President Banda, if the situation isn't handled firmly and fast.
With less food being grown, people are starting to sell their personal belongings and livestock so they get by in the coming weeks -- but that doesn't take care of their needs long-term, said UNICEF Executive Director Tony Lake, who spoke to CNN on a dry plain in Banda, south of Chad's capital, Ndjamena.
In addition to Madonna's daughter Lourdes, from a previous marriage, the pair added to their family by adopting a Malawian boy, David Banda, in 2006.
They stayed poor and Dr Banda spent at least a month a year at a top London hotel.
In a news conference earlier Friday, Banda told reporters she was kept "in the dark" regarding the president's condition.
Opposition leader Michael Sata has won Zambia's presidential election after two days of vote counting following a tight race with incumbent Rupiah Banda.
The BBC Raphael Tenthani in Blantyre says that Mrs Banda has been on a charm offensive to regain much-needed aid, following a year of shortages of fuel and foreign currency.
The report, presented to Ms Banda last Wednesday following an official inquiry, alleged that government ministers and other senior officials held a number of secret meetings aimed at preventing Ms Banda - then vice-president - from assuming the presidency in accordance with the constitution, our reporter says.
For a start, independent observers questioned Mr Banda's narrow victory over his chief rival in last year's presidential election.
It's also pretty clear that President Banda's office has handled a messy situation with staggering ineptitude.
And she was the first female Banda artist to sell-out a concert at the Gibson Amphitheater in Universal City, California.
Zambia's former President Rupiah Banda has pleaded not guilty to a charge of abuse of power during his time in office.
Mr Neilson said the US singer admired President Banda, who came to power a year ago, and said "contrary to reports, Madonna's relationship with Malawi government is good".
In 1966, Malawi became a republic within the Commonwealth with Dr. Hastings Banda as its first president.
Earlier this year, President Joyce Banda pledged to review the laws in a move aimed at boosting relationships with international donors.
His successor, President Joyce Banda, has taken steps to appease donors with a series of reforms.
She sang traditional Mexican ballads and was nominated for a Latin Grammy Award in 2002 in the category of best banda album.
Today, Banda Aceh is rattled by quakes sometimes two to three times a week.
The new government has launched a high-profile investigation into allegations of corruption by members of Mr Banda's administration.
Recent Zambian elections teetered on a knife-edge when the opposition won there, before President Rupiah Banda gracefully accepted defeat rather than cry foul.
Malawi President Joyce Banda will address the Scottish Parliament before joining First Minister Alex Salmond on a visit to the centre in Blantyre.
BBC: Events mark birth date of explorer Dr David Livingstone
However, Banda was expelled from the ruling Democratic People's Party in 2010 in a dispute with Mutharika over the president's efforts to position his brother rather than the vice president as his eventual successor.
"It's a very good mela, very well organised, " says Shambhu Lal, who lives in Banda district.
Turning his back on former allies in the struggle for independence, Dr Banda gave diplomatic support to South Africa's white rulers, who built him a palace and a new capital in return.
Last month, Mrs Banda devalued Malawi's currency, the kwacha, by one third against the dollar - a move Mr Mutharika resisted, despite demands from the IMF.
Meanwhile, after Dr Banda presented St Mirren with the Scottish Communities League Cup at Hampden Park, Mr Salmond also announced a new football partnership between the two countries.
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