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An investigation was underway in Kentucky on Wednesday to determine the causes of the explosion that destroyed a Louisville factory, killing two people and injuring several others.
The explosion occurred around 3 p.m. EST (2000 GMT) Tuesday at a factory owned by Givaudan GIVN.S that makes colors and flavorings for the food and beverage industries, according to the company's website.
Two people were killed in the explosion, the company said Wednesday.
Twelve people were taken to hospitals with various injuries, Louisville Mayor Craig Greenberg said in a statement. Injuries range from minor to serious, even fatal.
The Louisville Fire Department is leading the investigation and a federal reconstruction team from the Bureau of Alcohol, Tobacco, Firearms and Explosives will help determine the cause of the incident, Greenberg said.
The explosion was heard throughout the city and blew out windows of nearby buildings, local media reported.
City officials said air quality testing was underway at the site, but there was no indication of danger at this time.
A shelter order was issued for anyone within a one-mile radius of the explosion. That order was lifted about 90 minutes after the explosion, according to Louisville Metro Emergency Services.