The Supreme Court of Papua New Guinea rules that the August 2011 election of Peter O'Neill as Prime Minister was unconstitutional and orders the reinstatement of former Prime Minister Michael Somare to office.
The Supreme Court of Papua New Guinea dismisses a legal challenge against the election of Prime Minister James Marape. The opposition had argued that Marape's election was unconstitutional after the original candidate, Peter O'Neill, withdrew his nomination, paving the way for Marape's election.
A warrant is issued for the arrest of Peter O'Neill, Prime Minister of Papua New Guinea, in relation to a fraud case related to alleged payment of millions of dollars in illegal payments to a law firm. The Supreme Court of Papua New Guinea later stays the warrant.
Police blockade the Parliament of Papua New Guinea in Port Moresby the day after the government led by Prime Minister of Papua New Guinea Peter O'Neill lays sedition charges against the Chief Justice of the Supreme Court of Papua New Guinea, Sir Salamo Injia.
Papua New Guinea constitutional crisis: Soldiers supporting former Papua New Guinea Prime Minister Michael Somare stage a mutiny in Port Moresby. PNG Brigadier General Francis Agwi is said to be under house arrest.
Political tension continues in Papua New Guinea with former Prime Minister Sir Michael Somare expected to be sworn in again following a ruling by the Supreme Court and incumbent PM Peter O'Neill refusing to stand aside.