Papua New Guinea's police chief of operations has warned people in the capital not to take to the streets today in protest against the Prime Minister.
Police say there will be a lockdown today in Port Moresby where another large public protest is planned.
On Tuesday a large protest proceeded despite a police ban.
Jim Andrews says approval was not granted for this protest because permission was not sought two weeks in advance.
He says extra police officers have been deployed on Port Moresby's streets to maintain order, and similar efforts are being made in other centres.
"I am worried about the foreign investors that are coming into Papua New Guinea, business houses and engineers throughout the country, as well as the schools and all that. Those are the priority areas that will not be disturbed by this group of people for their own agendas."