A chartered plane carrying former US president Bill Clinton had to make an emergency landing after one of its engines developed a problem during a flight over Tanzania.

Mr Clinton's spokesman, Matt McKenna told the Associated Press 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.

Mr Clinton is in the East African nation 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.