Two critical parts of the infrastructure of Papua New Guinea's capital, Port Moresby, are facing demands from landowners for the Government to pay compensation.
The Post Courier newspaper reports customary Dubara landowners at Jackson's International Airport have threatened to close it down if an outstanding compensation claim is not settled.
Meanwhile, the owners of the land on which the Rouna hydro-power stations are located outside Port Moresby have threatened to shut them down unless they receive two and a half million US dollars.
The paper says the threats are timed to seek a favourable response from the Government before next month's visit by the Prince of Wales and the Duchess of Cornwall.
The Dubara landowners met at Vadavada settlement in Port Moresby yesterday and demanded that about two point two million US dollars owed to them be paid immediately or they would forcefully shut down the airport.
The Dubara clan claims to own all the land on which Jackson's stands along with some of the surrounding property.
A spokesperson Kila Joe Gabutu says landowners are frustrated at the government's failure to honour a deed of release signed with them six years ago.