Two people are reported to have been seriously injured and "many" have been taken to hospital.
According to police, there appear to have been two shooters who "probably shot at each other." Neither of them has been arrested.
Videos on social media show people running as the sounds of gunshots are heard.
The incident took place on Saturday afternoon, local time. It is one of at least 170 mass shootings in the United States this year, according to the organization Gun Violence Archive (GVA), which defines a mass shooting as an incident in which at least four people are shot, CNN reports.
