An unidentified man was shot and killed by an Alaska State Trooper at South Kasilof Beach early Monday morning after troopers say he charged them while brandishing a harpoon.

According to a dispatch from troopers, they were called shortly after midnight and told that a man was threatening to kill people with a sword at the beach, where the personal use dipnetting season is underway.

When troopers arrived, the dispatch says that a man carrying a harpoon ran at their vehicle. He “initially retreated” when troopers said to step back, but he charged again when they exited the vehicle, troopers said. A trooper shot the man.

The man was declared dead at the scene, the dispatch says, despite lifesaving efforts by troopers and by emergency medical services. His identity has not yet been released.

The Alaska Bureau of Investigation is “actively investigating the incident thoroughly,” the dispatch says. The name of the trooper who shot the man will be released Thursday morning.

This story will be updated when identity of both individuals are released and when any further information is available.

Reach reporter Jake Dye at jacob.dye@peninsulaclarion.com.