Nassau County, N.Y., police are looking for Sang Ho Kim, the man they believe is responsible for shooting two people near the Roosevelt Field Mall in Garden City, Long Island. Authorities said one of the victims was killed and the other is reportedly having surgery -- their names have not been released, CBS News reported Wednesday afternoon.

Kim apparently opened fire in the office of Savenergy, a lighting company, just after 10 a.m. EDT over a business deal that went bad, the TV network reported. Police are certain he “is not in the immediate area” since they have thoroughly searched all nearby buildings.

The 63-year-old vendor, who worked with the lighting company, was described as "disgruntled." Authorities don’t believe Kim is on a “random shooting rampage,” but added that he is “very dangerous.”

Kim is said to be 6 to 6-foot-2 in height, the Long Island Press wrote. He was last seen wearing a red shirt and a gray or brown suit jacket. After the shooting, the CBS News said he fled the scene in a white Honda Pilot with a New York license plate: FMA-3648, and then reportedly drove toward Roosevelt Field.

Local schools, which include Nassau County Community College and Hofstra University, are not in lockdown anymore. The lockout at Roosevelt Field Mall has also been lifted.

The mall took to its Facebook page and wrote: “We have been cleared by the Nassau County Police Department to reopen safely. Customers and employees can enter and exit the mall at this time. We suggest customers and employees contact individual retailers to ensure they are open.”

Twitter users took to the social media site to talk about the Long Island shooting on Wednesday to express their shock over the incident. Roosevelt Field Mall’s posts were shared scores of times to alert people in the area about the event.