The miner was bashed to death early on Sunday by a group of men in what is believed to have been a clan-related dispute.
The bus driver was killed when he arrived at the scene. An industry source told PNGIndustryNews.net he had been told the bus driver was shot in a case of mistaken identity.
Both deaths prompted local Porgera workers to go on a rampage of destruction at mine camp facilities, according to local media. There had been a campaign by PNG nationals to get the mine to provide safer onsite accommodation before Sunday's events.
According to The National this morning, operations at the gold and silver mine had returned to normal.
Provincial police commander Superintendent Martin Lakari reportedly thanked his policemen for bringing the situation under control.
"I want to make it clear that my men are on alert to deal with those culprits and opportunists who tried to instigate problems that would affect the mine again," he told the PNG newspaper.
"We are doing all we can to bring normalcy to the mine site and the Porgera station as well, so people must appreciate what we are doing and help police to restore peace."