Zimbabwe's main opposition party says it held two successful rallies in Harare Sunday despite harrassment from supporters of President Robert Mugabe.

Movement for Democratic Change spokesman Nelson Chamisa says militants from the ruling ZANU-PF party and so-called war veterans tried to disrupt the rallies by chanting threats, but that the rallies proceeded and were well attended.

The MDC staged the events following a High Court ruling on Saturday that overturned a police ban on selected MDC events.

The party is campaigning on behalf of its leader Morgan Tsvangirai, who faces President Mugabe in a June 27 run-off election.

The MDC says the president's supporters are using harrassment and violence in an effort to intimidate the opposition. Police detained Mr. Tsvangirai himself twice last week as he tried to attend campaign events.

The opposition leader is trying to unseat President Mugabe after 28 years in power.

The MDC says Mr. Mugabe's supporters have killed dozens of opposition members and attacked hundreds of others during the campaign.

In another development Sunday, Zimbabwe's High Court ordered police to release opposition lawmaker Eric Matinenga, who was arrested Saturday for the second time in a week.

He was initially arrested June 1 on charges of inciting public violence, but was released Thursday when a judge said he had been wrongly charged.

Some information for this report was provided by AP and Reuters.