Zimbabwe's President Mugabe 'resigns'

Zimbabwe's President Robert Mugabe has resigned, parliament speaker Jacob Mudenda says. A letter from Mr Mugabe said the decision was voluntary, Reuters news agency reports.

The surprise announcement came as lawmakers debated an impeachment motion against Mr Mugabe in a joint sitting of parliament.

Mr Mugabe had previously refused to resign despite last week's military takeover, and days of protests.

He has been in power since independence in 1980.