BOULDER, Colo. (AP) -- Authorities say an explosion has destroyed a vacant house in Boulder County, but no injuries have been reported.
Neighbor Bill Mundwiller tells the Boulder Daily Camera (http://tinyurl.com/mv7eb5a) the blast knocked him out of bed at about 3:30 a.m. Friday.
Nearby houses weren't damaged.
The house is in an incorporated area on Boulder's northeast side.
Sheriff's deputies and Xcel Energy crews were at the scene Friday.