Papua New Guinea's prime minister, Peter O'Neill, has accused the trade union leader, John Paska, of trying to incite anarchy.
Mr Paska is the general secretary of the Trade Union Congress and one of the leaders of a protest in Port Moresby, which has been raising concerns about controversial legislative moves by the government.
Mr O'Neill says Mr Paska called for businesses, shops and schools across the city to close.
And many have, with no school classes for two days and some businesses and public transport not operating.
The prime minister says Mr Paska is conducting a political vendetta against the government, which is threatening peace and good order.
He says he wants Mr Paska to account for what he calls his misconduct in office and to desist from making any further calls for civil action and public disturbance.