MONROE - Police are seeking information about a small explosion they believe was some type of fireworks that caused minor damage to the exterior of a Monroe building Saturday night. Monroe police and fire departments were called to the 2800 block of 6th Avenue just before 10 p.m. Saturday for reports of a loud explosion. They found "some sort of small explosive device exploded," causing damage to the ground and also minor damage to the side of a residential building, Police Chief Fred Kelley said in a press release.