New details are emerging about the homemade bomb that injured two men in Eastern Oregon over the weekend.
Authorities say 59-year-old Mark Brinton and 60-year-old Drex Brooks had detonated at least three explosive devices near a reservoir outside Vale before they were gravely injured.
Brinton is listed in critical condition at a Boise hospital. Brooks is being treated at OHSU in Portland. His condition is fair.
Police found bomb-making materials and instructions at a house in Ontario shared by the two men. Agents with the ATF are also analyzing a computer taken from the home.
Malheur County Sheriff Brian Wolfe says the incident doesn't appear to be related in any way to this week's bombings in Boston, but he says authorities still don't know why the men had the explosives, or what they meant to do with them.
"The investigation still has a long way to go in trying to answer those unanswered questions," said Wolfe.
Police defused an unexploded bomb left at the reservoir after the men were injured. Wolf says the device was equipped with the type of fuse that could be lit with a match or a lighter.
This story originally appeared on Oregon Public Broadcasting.