A spokesman for Bill Clinton says a chartered plane carrying the former U.S. president had to land unexpectedly after one of its engines developed a problem during a flight over Tanzania.

Matt McKenna told The Associated Press late Wednesday that "there was an issue with one of the plane's four engines" which was quickly repaired.

He said the aircraft was on the ground for less than 45 minutes before it took off again. He gave no more details about the incident.

Clinton is in the East African nation of Tanzania as part of a wider tour of projects run by the family foundation.

He will also visit Kenya, Liberia and Morocco, according to the Clinton Foundation.