President Robert Mugabe of Zimbabwe

Harare - Zimbabwe opposition leader Morgan Tsvangirai said on Thursday President Robert Mugabe should resign in the interest of the country after the military seized power.

Mugabe is insisting he remains Zimbabwe's only legitimate ruler and has balked at mediation by a Catholic priest to allow the 93-year-old former guerrilla a graceful exit after a military coup, sources said on Thursday.

Read: Mugabe to hand over power to Mnangagwa shortly - report

Also read: Mugabe resisting military pressure to quit, says source

"In the interest of the people, Mr. Robert Mugabe must resign and step down immediately," Tsvangirai, leader of the Movement for Democratic Change, told a news conference, reading from a statement.