Ghana's President John Atta Mills, who had been suffering from throat cancer, has died in the capital, Accra.A statement from his office said the 68-year-old died a few hours after being taken ill, but did not give details.
"It is with a heavy heart...that we announce the sudden and untimely death of the president of the Republic of Ghana," the statement said.
Mr Atta Mills has ruled the west African country since 2009.
A presidential aide said Mr Atta Mills had complained of suffering pains on Monday evening and he died on Tuesday afternoon, Reuters reports.
He had returned to Ghana after visting the US for medical checks, the news agency says.
My condolences to our Ghananian friends.
Hopefully, they should have a peaceful swearing in ceremony, so the VP, John Mahama can take charge.