Sartell paper plant explosion

Saying it's "a very sad day for our Verso family," the plant manager of Sartell's Verso paper plant says the cause of a massive explosion earlier today is still unknown.

One person was killed and four hurt in the explosion and subsequent fire at the Verso Paper Plant in Sartell.

Here are some great photos of a helicopter dumping water on the Verso Paper Plant fire in Sartell. (Photos: Ben Theisen and his iPhone)

Sartell city officials held a news conference to update the media on the explosion at the Verso Paper Plant.

Here are some photos of the Verso Paper Plant in Sartell.

Benton County authorities say there's been "a major explosion" at the Verso paper mill in Sartell, and heavy black smoke began pouring out of the center of the mill.