Zimbabwe ? Zimbabwe’s main opposition leader was freed after several hours in police custody, but nine others detained in a raid were charged Thursday in what the government alleged was a terror campaign, opposition officials said.

The detentions were part of a political crisis that has provoked concerns of a spillover in the rest of the region, and African leaders at an emergency meeting Thursday in Tanzania appointed South Africa’s president to mediate.

The main opposition Movement for Democratic Change party accused President Robert Mugabe’s government of trying to demonize its critics by fabricating allegations of an armed terror campaign.