MESA COUNTY, Colo. Three federal firefighters were killed, and two were injured, Saturday in a wildfire burning near the Colorado-Utah state line, the U.S. Wildland Fire Service reported Sunday.The agency created earlier this year to streamline firefighting and fire reduction across public lands said the firefighters had been part of an interagency response to the Knowles and Gore fires on Saturday.In a release, the agency said it occurred during a burnover incident, in which fire sweeps through an area or overtakes personnel or equipment, leaving no viable escape routes or safety zones.The U.S. Wildland Fire Service stands united with the USDA Forest Service in grief and in our unwavering support for the loved ones left behind. Their bravery, dedication, and sacrifice will never be forgotten," it said in a statement on Facebook.The two injured firefighters are being treated for burn injuries, according to the department. The identities of the two firefighters are being withheld pending notifications.Gov. Jared Polis also declared an emergency on Saturday, and authorized the use of the National Guard to tackle the fires.According to his office, the Jones, Snyder Mesa, and Knowles Fires combined and are now the Snyder Mesa Fire, which has burned more than 28,000 acres."Im devastated about the loss of three heroic firefighters who died in the line of duty in Western Colorado. The men and women who serve on the front lines of these fires risk their lives to keep us safe and to protect the lands and communities we love. To the loved ones of those lost, and to their fellow crew members - some who are still battling the flames know that the State of Colorado mourns alongside you, Polis said in a statement.The loss of three firefighters is being felt across Colorado and the nation as several state and federal agencies honored their service and shared their condolences in statements issued Sunday.The National Weather Service issued a red flag warning for several Western Slope counties Sunday due to extreme wildfire conditions. Rapid fire growth is likely.Colorado's fire danger is higher this year because of state's record-low snowpack and its warmest winter on record. Much of the West is grappling with similar conditions, according to the National Interagency Fire Center.The Mesa County fire is one of multiple wildfires burning on the Western Slope, including the Gold Mountain Fire in Ouray County and the Ferris Fire in Dolores County, where fire activity has intensified.The Associate Press contributed to this report ...read more read less