A fire at a northern Illinois propane gas business forced the evacuation of the area around the facility and attracted crews from 30 suburban Chicago fire departments before being extinguished.
Authorities say no injuries resulted from Thursday's fire at the Pinnacle Propane plant.
Gurnee Deputy Police Chief Willie Meyer says initial calls to the department's emergency number came from people who thought exploding propane tanks were gunshots.
Area residents and workers were ordered to leave by Gurnee police as a safety measure.
Firefighters from Libertyville, Round Lake and Waukegan were among those fighting the fire.
A Pinnacle Propane spokesman said in a statement that an investigation is being conducted to determine the cause of the incident, and "to mitigate the risk of any future incidents."
A business touted by Poway last year in a promotional video as being a shining example of innovative and cutting-edge companies calling the city home has folded -- one year after a prototype of its energy storage device exploded inside a warehouse.
Microsoft says it is cutting 2,850 jobs, about 2.5 percent of its workforce, as it further scales back its troubled smartphone business.
A spokeswoman says the layoffs will mostly affect workers in the company's smartphone hardware operation and related sales teams.