Zimbabwe's prime minister, Morgan Tsvangirai, has unveiled a coalition including former allies of Robert Mugabe, in an effort to unseat the veteran president at elections later this month.
Tsvangirai's Movement for Democratic Change (MDC) said on Monday it had joined forces with Mugabe's former finance minister Simba Makoni and the ZANU-Ndonga Party ahead of elections on July 31.
The three formed a "coalition for change" behind Tsvangirai's bid for president, according to a joint statement.
Makoni, a former senior official in Mugabe's ZANU-PF Parky, quit the party in 2008 to form his own party Mavambo-Kusile-Dawn and challenge Mugabe in the presidential race.
The third partner in the coalition is ZANU-Ndonga, a party that was allied with Mugabe during the fight for Zimbabwean independence, but later split.
The three partners said they will support each other in the parliamentary and local authority elections and form a government of national unity" if they win the vote.
"The government of national unity will be based on the free will of the people as opposed to the current coalition government created after the subversion of the will of the people in the 2008 presidential election," Makoni said.
Mugabe, 89, and Tsvangirai, 61, were forced into a shaky power-sharing government four years ago after a bloody presidential run-off election which Tsvangirai boycotted citing violence against his supporters.
Some 200 opposition activists were killed in the election unrest. New elections were supposed to be held 18 months after the formation of the coalition government in 2009 but were delayed by frequent disagreements among the parties over reforms to pave the way for free and fair polls.
The announcement of Tsvangirai's partnership with two other parties comes just days after a splinter group from his MDC signed an agreement with the powerful Zimbabwe African People's Union (ZAPU) to support each other's candidates.