The UN, the African Union and the West African bloc, Ecowas, have urged the opposition in Ivory Coast to respect constitutional order after it rejected President Alassane Ouattara's re-election and vowed to set up a transitional government.
A joint statement has called on all parties to exercise dialogue and restraint.
Earlier, the Ivorian government accused the opposition of sedition and asked the public prosecutor to bring those involved to justice.
Police have surrounded the house of the opposition leader, Henri Konan Bédié, firing tear gas at his supporters.
The opposition accuses Mr Ouattara of an electoral coup.