Opposition parties in Zambia say they are reporting the country's president, Edgar Lungu, and several governing party officials, to the International Criminal Court in The Hague for instigating political violence.
At a press conference in the capital, Lusaka, ten opposition politicians accused President Lungu and Zambia's home affairs minister, Stephen Kampyongo, of ordering militias to attack the opposition during recent by-election campaigns.
No one from the governing party has responded to the allegations.
The main opposition leader, Hakainde Hichilema, said last week that police had tried to assassinate him while he was out campaigning.
Human rights groups say oppression has increased during President Lungu's four years in office.