Subscribe | UPI Odd Newsletter Subscribe PITTSBURGH, Feb. 27 (UPI) -- A fog machine at an outdoor art installation in downtown Pittsburgh, has led firefighters to be called to the scene, at least twice, for false alarms. Renee Piechocki, director of the city's Office of Public Art, said the fire department's 11 a.m. Thursday visit to Market Square marked the second time firefighters had been called to the installation, titled A Winter Landscape Cradling Bits of Sparkle, by passersby who confused the machine's fog for smoke. Advertisement "It's just a fog machine," Piechocki told the Pittsburgh Post-Gazette. "People from the Pittsburgh Downtown Partnership will communicate with the fire department to make sure they're aware." Piechocki said the installation by artist Jennifer Wen Ma, which features 125 mulched trees surrounded by a wooden path, uses the fog machine to "make people feel like they're on a cloudy mountaintop." The installation is scheduled to remain until April 12. Read More Texas man investigated after posting photo of dead dogs Couple sleeping in trash bin, puppy rescued from garbage truck Rescuers work to free manatees trapped in Florida storm drain Firefighter falls into frozen pond during dog rescue