It wasn't immediately clear if the victims were targeted specifically but all appeared to be employees with Stop & Shop, investigators said. The victim who died was a man around 49 years old. Two other victims were taken to area hospitals; they were said to be conscious and alert and assisting law enforcement. Their identities haven't been released and the nature of their injuries wasn't known. The West Hempstead School District confirmed that its schools were in a "lock out" and urged the public not to come to its buildings. A spokeswoman for Nassau County said police were asking all nearby residents to remain indoors.