Photo: The Canadian Press

Disgruntled police, military and prison guards stormed Papua New Guinea's Parliament on Tuesday in a violent pay dispute stemming from an international summit hosted by the impoverished South Pacific island nation over the weekend, a lawmaker said.

Images posted by opposition lawmaker Bryan Kramer on social media showed broken windows, smashed furniture, pictures torn from walls and plants tipped over.

Parliament's security check point including a metal detector was trashed and doors were destroyed along with their fingerprint-reading locking systems, Kramer said.

He said the protesters had not been paid their promised allowances for their security work at the Pacific Rim leaders' summit held in Port Moresby, a city described by the World Bank as among the world's most violent due to high unemployment and brazen criminal gangs known as "raskols."

The Asia-Pacific Economic Cooperation meeting was attended by U.S. Vice-President Mike Pence, Chinese President Xi Jinping, Japanese Prime Minister Shinzo Abe and others.

When the protesters tried to enter Parliament, "there was a confrontation between Parliament security and members of the security forces," Kramer said. "It erupted into a scuffle, several staff were assaulted as they made their way into Parliament."

Kramer said he did not see anyone use a weapon in the conflict and he was not aware of any serious injuries, although there were spots of blood throughout the building.

Kramer and his opposition colleagues remained in a meeting room within the Parliament building throughout the 30-minute attack.

Following the rampage, more than 100 police, military personnel and prison guards waited outside Parliament demanding to be addressed by the government about their allowances, Kramer said. But they eventually left the area.

Working police later provided security for parliamentary staff in the building and patrolled surrounding streets.

The violence at Parliament coincided with reports of looting of surrounding businesses, as criminals apparently took advantage of the breakdown in law and order.

Neither Prime Minister Peter O'Neill's office nor police chief Superintendent Dominic Kakas immediately responded to requests for comment.

Acting Correctional Services Commissioner Stephen Pokanis confirmed to the Australian Broadcasting Corp. that the protesters went to Parliament to demand the immediate payment of APEC allowances.

Papua New Guinea APEC Coordination Authority chief executive Chris Hawkins said allowance payments to security personnel after a major event would normally take a week.

"The meeting ended two days ago and the security operation is now winding down," Hawkins said in a statement. "The payment of individual allowances has already commenced and individual security force members should check with their banks as payments are made."