Authorities say a 15-year-old boy is the suspect in the large Eagle Creek Fire burning east of Portland that was likely caused by fireworks. The Oregon State Police said in a statement Tuesday that the teen from Vancouver, Washington, and others may have been using fireworks on a popular trail in the Columbia River Gorge area. The blaze that has closed an interstate highway and forced hundreds to flee began Saturday. Authorities say the boy was interviewed in the parking lot of the trailhead. State police say the investigation is continuing. No arrests or formal charges have been made. Meanwhile, Oregon fisheries managers have released thousands of hatchery salmon months early in response to a large wildfire raging in the Columbia River Gorge. The Oregon Department of Fish and Wildlife said Tuesday it released the fish into the Columbia River to reduce demands on water and equipment.