Explosion at RR Donnelley facility in Wisconsin MONROE, Wisconsin (From news reports) -- Firefighters responded to an explosion in Monroe early Saturday morning, May 9. According to a Facebook post from the Monroe Fire Department, firefighters were sent to RR Donnelley after the sprinkler system there was activated. Officials said when firefighter arrived on the scene, they noticed smoke coming from the building, and that some windows were damaged. The Monroe Fire Department said there had been an explosion in the building which resulted in a fire that activated the sprinkler system. The fire was controlled by the sprinkler system. There was some damage to equipment and the building, however the business has sufficient backup equipment to avoid a closure. The Monroe Fire Department also said the staff at the company worked very well with firefighters to get things quickly resolved and into recovery.