Papua New Guinea's veteran politician, Sir Michael Somare, has returned to Port Moresby after spending five months in Singapore for medical reasons.
Sir Michael returned for tomorrow's session of parliament to avoid being disqualified as an MP for missing three consecutive sittings.
Last week, he issued a statement declaring he was still the prime minister and intended completing his term.
A month ago, Sir Michael was controversially replaced by Peter O'Neill after a parliamentary vote declared the prime minister's office was vacant.
The legality of the action is being challenged in the courts.