Thousands of opposition supporters marched in the Democratic Republic of Congo Wednesday to demand that voter registration be reopened.

Opposition party leader Etienne Tshisekedi asked supporters to join the rally and press for electoral concessions.

The march to U.N. peacekeeping headquarters in Kinshasa coincided with a visit to the DRC by United Nations Secretary-General Kofi Annan.

Speaking Tuesday in Kinshasa, Mr. Annan said the June elections must be run by the rules, but also must be inclusive.

The vote in June will be Congo's first democratic elections in more than 40 years.

Earlier this month, riot police used batons and tear gas to disperse opposition members during a similar political rally.

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