"A series of shootouts between rival tribes over a disputed gold mine has left at least 30 people dead in Papua New Guinea"

BBC:

There were reports in local media that the Canadian-owned mine - the second largest in Papua New Guinea - was briefly forced to cease operations as the fighting intensified.

Buildings were set on fire and schools, hospitals and government offices in the region have been closed

...

The Porgera gold mine once accounted for around 10 percent of Papua New Guinea's yearly export earnings, but tribal violence and a slow government takeover have stalled production in recent years.