Prime Minister Morgan Tsvangirai's staffers were taken in for questioning.
JOHANNESBURG - Leader of Zimbabwe&39;s Movement for Democratic Change, Morgan Tsvangirai, says President Robert Mugabe should resign immediately.
He says the country is facing a national crisis.
Tsvangarai says only the military can decide if Mugabe and First Lady, Grace Mugabe, can receive immunity.
The former prime minister says President Jacob Zuma and other regional ministers have not reached out to him.
Tsvangirai is urging every person over 18 to vote when elections come.