HARARE, Zimbabwe (AP) — The U.N. High Commissioner for Human Rights has arrived in Zimbabwe on the first mission to the troubled southern African nation by the world human rights chief.

Officials said Sunday that Navi Pillay's week-long trip is at the invitation of a three-year coalition government formed in 2009 after disputed, violent elections plagued by rights abuses blamed mainly on militants of President Robert Mugabe's party and loyalist police and troops.

Patrick Chinamasa, Mugabe's justice minister, told state media Sunday that the South African-born Pillay will meet with Mugabe, political leaders and rights groups. He said "we have nothing to hide."

The chief U.N. torture investigator was barred entry at the Harare airport in 2009 after claims the visit was not officially cleared.