Zimbabwe's Prime Minister Morgan Tsvangirai has again raised his concerns over the failure to implement the power-sharing deal he agreed to with President Robert Mugabe last year, according to media reports on Wednesday.

Tsvangirai, during a visit to Mozambique on Tuesday, signalled his commitment to the unity government but noted that would only "re-engage if the power-sharing agreement is implemented in its entirety," the reports said.

Tsvangirai on Friday announced he was pulling ministers from his Movement for Democratic Change (MDC) out of the coalition cabinet, while stressing he was not "pulling out officially" from the eight- month-old power-sharing government.

"I highlighted the lack of credibility of government of inclusion. In just about eight months nothing has been made in order to implement what was signed on the power sharing agreement," Tsvangirai was quoted as having told reporters after talks with Mozambican President Armando Guebuza on Tuesday.

"I'm concerned about the functioning of the government of inclusion, although I'm still committed with the government of inclusion," he added.

Tsvangirai had voiced concern during his meeting with Guebuza, who chairs the Southern African Development Community's (SADC) troika on security and politics, over issues that remained unresolved in the deal with Mugabe and his Zanu-PF party, according to a SADC spokesperson said.

Guebuza reportedly promised to send representatives of the troika to assess the situation in Zimbabwe and meet with MDC and Zanu-PF officials, including Mugabe, next week.

Among other outstanding issues thwarting the full implementation of the agreement, Tsvangirai has cited Mugabe's unilateral appointment of his cronies to the posts of Reserve Bank governor and attorney general, the unequal distribution between the parties of the posts of 10 provincial governors (all are currently from Zanu-PF), and the selective application of the law.